Title of Invention: Anode Active Material, Anode and Lithium Secondary Battery Containing Same technical field [One] Cross Citation with Related Applications [2] This application claims the benefit of priority based on Korean Patent Application No. 10-2018-0158018 dated December 10, 2018, and all contents disclosed in the literature of the Korean patent application are incorporated as a part of this specification. [3] technical field [4] The present invention relates to an anode active material, an anode comprising the same, and a lithium secondary battery, and more particularly, to an anode active material having a conductive material stably attached to the surface through an organic connector, and to an anode and a lithium secondary battery comprising the same . background [5] Due to the rapid increase in the use of fossil fuels, the demand for the use of alternative energy or clean energy is increasing. [6] Currently, a secondary battery is a representative example of an electrochemical device using such electrochemical energy, and its use area is gradually expanding. Recently, as technology development and demand for portable devices such as portable computers, portable phones, and cameras increase, the demand for secondary batteries as an energy source is rapidly increasing, and among such secondary batteries, high energy density, that is, high capacity lithium secondary batteries A lot of research has been done on it, and it has been commercialized and widely used. [7] In general, a secondary battery is composed of a positive electrode, a negative electrode, an electrolyte, and a separator. A metal oxide such as LiCoO 2 , LiMnO 2 , LiMn 2 O 4 or LiCrO 2 is used as a positive active material constituting the positive electrode of a lithium secondary battery, and as a negative active material constituting the negative electrode, metal lithium, graphite (graphite) ) or a carbon-based material such as activated carbon, or a material such as silicon oxide (SiO x ) is used. Among the anode active materials, metallic lithium was mainly used in the beginning, but as the charging and discharging cycle proceeds, lithium atoms grow on the surface of metallic lithium to damage the separator and damage the battery. Recently, carbon-based materials are mainly used. However, in the case of a carbon-based material, the theoretical capacity is only about 400 mAh/g, so it has a disadvantage that the capacity is small. Various studies are being conducted to replace the carbon-based material using a material. [8] However, a material having a high capacity has a problem in that the volume changes excessively during the charging and discharging process, causing an electrical short in the electrode, and the growth of a thick and unstable solid electrolyte interface (SEI), which deteriorates the performance of the battery. [9] Conventionally, in order to solve this problem, a method of forming a carbon coating layer on the surface of silicon-based particles or using an additional conductive material has been attempted. [10] However, the method of forming the carbon coating layer requires a process of applying heat when forming the carbon coating layer, so there is a problem in that the silicon-based particles are cracked or the pores are reduced, so that the efficiency is reduced. When this is increased, there is a problem that agglomeration between the conductive materials occurs. [11] Accordingly, as disclosed in Korean Patent Application Laid-Open No. 10-2016-0149862, a method of further controlling the volume change by further disposing a polymer composite on the carbon coating layer was attempted. However, even if the polymer composite is additionally formed, it is not easy to control the volume change, and on the contrary, the conductivity of the active material is lowered, thereby increasing resistance and lowering the capacity retention rate of the battery. In addition, since the silicon-based particles are excessively coated, it is difficult to absorb lithium ions, which leads to a decrease in capacity. [12] Therefore, there is a demand for the development of a new technology capable of solving problems such as electrical short circuit and performance degradation in the electrode due to the volume change of the high-capacity anode active material. [13] [Prior art literature] [14] [Patent Literature] [15] Korean Patent Publication No. 10-2016-0149862 DETAILED DESCRIPTION OF THE INVENTION technical challenge [16] SUMMARY OF THE INVENTION An object of the present invention is to provide a high-capacity anode active material having excellent conductivity without an electrical short circuit in an electrode. [17] Another object of the present invention to be solved is to provide a negative electrode for a lithium secondary battery including the negative electrode active material. [18] Another object of the present invention to be solved is to provide a lithium secondary battery including the negative electrode. means of solving the problem [19] In order to solve the above problems, the present invention provides an active material core capable of intercalating and releasing lithium ions; a plurality of conductive materials positioned on the surface of the active material core; a plurality of organic linkages comprising a hydrophobic group and a polar functional group bonded to the hydrophobic group; and an elastic unit; wherein the elastic unit includes an elastic portion having two or more binding sites, and a functional group bonded to the binding site of the elastic portion and capable of reacting with a polar functional group of the organic linkage, wherein the plurality of Among the organic linkages of It provides an anode active material combined with. [20] In addition, in order to solve the other problems, the present invention is a negative electrode current collector; and a negative electrode active material layer formed on the negative electrode current collector and including a negative electrode material, wherein the negative electrode material provides a negative electrode including the negative active material described above. [21] In addition, in order to solve the another problem, the present invention is the above-described negative electrode; an anode opposite the cathode; a separator interposed between the negative electrode and the positive electrode; and an electrolyte; provides a lithium secondary battery comprising. Effects of the Invention [22] The negative active material according to the present invention is located on the surface of the active material core where lithium ions can be occluded and released and includes a conductive material to which one or more organic connectors are bonded, wherein the organic connectors are connected to the surface of the active material core or an elastic unit. Therefore, the conductive material is firmly bonded to the surface of the negative active material, and the conductive materials are connected to each other, so that the conductive material can provide continuous electrical conductivity even when the volume changes due to charging and discharging of the negative active material, and can exhibit improved lifespan characteristics. Brief description of the drawing [23] 1 to 5 are diagrams for schematically explaining a method of manufacturing an anode active material according to the present invention. [24] 6 is a graph evaluating capacity retention rates according to cycles of Examples 1 to 3, Comparative Example 1, and Comparative Example 2; Modes for carrying out the invention [25] Hereinafter, the present invention will be described in more detail to help the understanding of the present invention. [26] The terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor may properly define the concept of the term in order to best describe his invention. Based on the principle that there is, it should be interpreted as meaning and concept consistent with the technical idea of ​​the present invention. [27] As used herein, the term 'polycyclic ring group' is, unless otherwise stated, a condensed ring, a condensed ring, and a condensed nucleus, which is a ring in which two or more rings are bonded by sharing two or more atoms, respectively.核) means [28] As used herein, the term 'alkyl' refers to a straight-chain, cyclic or branched hydrocarbon moiety, unless otherwise indicated. [29] The term 'linear conductive material' as used herein, unless otherwise stated, means a conductive material having a fibrous structure such as a cylindrical type or a tube type, and the 'planar conductive material' is flat, sheet-like, It means a flaky conductive material, and 'point-shaped conductive material' means a generally used conductive material having a generally spherical particle shape. [30] [31] [32] The present invention relates to an anode active material, specifically, to an anode active material for a lithium secondary battery. [33] An anode active material according to the present invention includes an active material core capable of intercalating and deintercalating lithium ions; a plurality of conductive materials positioned on the surface of the active material core; a plurality of organic linkages comprising a hydrophobic group and a polar functional group bonded to the hydrophobic group; and an elastic unit; wherein the elastic unit includes an elastic portion having two or more binding sites, and a functional group bonded to the binding site of the elastic portion and capable of reacting with a polar functional group of the organic linkage, wherein the plurality of Among the organic linkages of is combined with [34] According to the present invention, in the negative active material, since the conductive material may be tightly coupled to the core surface of the active material by the organic connector, and the conductive materials may be connected to each other by the elastic unit, the negative active material Since the conductive material can continuously provide electrical conductivity between active materials despite volume expansion/contraction due to charging and discharging, improved stability can be exhibited. [35] [36] The active material core is not particularly limited as long as it is a material capable of occluding and releasing lithium ions, but includes an organic connector according to the present invention, an elastic unit, and a plurality of conductive materials connected to or connected to the active material core by these. The effect can be more preferably exhibited in the case of a material having a high capacity and a large volume change during charging and discharging. The active material core capable of occluding and releasing lithium ions may be at least one selected from the group consisting of Si, SiO x (0 [84] In addition, the present invention provides a method for preparing the above-described negative electrode active material. [85] Specifically, the method for preparing a negative active material according to the present invention comprises the steps of dispersing a conductive material and an organic linkage in a solvent; adding and mixing the active material core to the solvent; and adding and mixing the elastic unit to the solvent. [86] [87] Hereinafter, with reference to the drawings, a method of manufacturing the negative active material according to the present invention will be described in detail. In adding reference numerals to components in each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof may be omitted. [88] 1 to 5 are diagrams for schematically explaining a method of manufacturing an anode active material of the present invention. [89] Referring to FIG. 1 , a conductive material 10 and an organic connector 20 are dispersed in a solvent. The conductive material 10 and the organic connector 20 may be the same as the aforementioned conductive material and the organic connector. [90] As shown in FIG. 1 , as the conductive material 10 and the organic connector 20 are first dispersed in the solvent, the organic connector 20 can be effectively dispersed in the solvent and at the same time, the conductive material 10 ) is effectively dispersed in the solvent without debundling, so that the hydrophobic groups in the conductive material 10 and the organic connector 20 can be coupled to each other by van der Waals attraction. If the conductive material is not first dispersed with the organic connector and mixed together with the active material core and elastic unit, which will be described later, the aggregation of the conductive material is intensified and it is difficult to combine with the organic connector by van der Waals attraction. Accordingly, the bonding between the conductive material and the active material core and the bonding between the conductive materials by the elastic unit may not be formed. [91] When the conductive material 10 and the organic connector 20 are first dispersed, the solvent may be a polar solvent. When the dispersion of the organic linkage and the conductive material is performed in a polar solvent, the organic linkage can be more easily dispersed, and the polar functional group of the organic linkage can be made to have strong polarity, so that the polar functional group is an active material By reacting with a hydroxyl group on the surface of the core or a functional group of the elastic unit, the conductive materials may be connected to the surface of the active material core by an organic linker, or different conductive materials may be connected to each other by the elastic unit. The polar solvent may be N-methylpyrrolidone and/or an aqueous NaOH solution, preferably N-methylpyrrolidone in terms of being able to easily mix and disperse the elastic unit in the solvent without phase separation. If the solvent is not a polar solvent, there is a fear that the dispersion of the organic linkage in the solution may not be achieved, and the polar functional group of the organic linkage may be difficult to react with the surface of the active material core and/or the elastic unit. It may be difficult to form the negative active material of the present invention. [92] 2 and 3 , the active material core 30 is added to the solvent and mixed. The description of the active material core 30 has been described above. [93] Referring to FIG. 2 , functional groups 35 such as hydroxyl groups (OH groups) may be present on the active material core 30 . The functional group 35 is bonded to the surface of the active material core by a binding site (*), and may be formed by oxidizing the surface of the active material core 30 by oxygen in the air. [94] Referring to FIG. 3 , a functional group 35 on the surface of the active material core 30 and a part of the organic connector 20 may react to form a combination 25 of the active material core/organic connector/conductive material. The surface of the conductive material 10 and the active material core 30 may be connected to each other by the active material core/organic connector/conductive material combination 25 . [95] 4 and 5, the elastic unit 40 is added to the solvent and mixed. The elastic unit 40 may be the same as the aforementioned elastic unit. [96] 4 and 5 , the elastic unit 40 includes a functional group such as an isocyanate group capable of reacting with the polar functional group of the organic linkage at two or more terminal sites. Accordingly, a portion of the plurality of organic connectors 20 may react with a functional group of the elastic unit 40 to form a conductive material/organic connector/elastic unit/organic connector/conductive material combination 45 . Accordingly, two or more conductive materials among the plurality of conductive materials 10 may be connected to each other through the elastic unit 40 . [97] At this time, the process of dispersing the organic linkage and the conductive material in the solvent, the process of mixing the elastic unit, and the mixing process of the active material core are conventional mixing methods, such as ultrasonic dispersion (sonification), ball mill (ball mill), Milling methods such as bead mills and basket mills, or mixing devices such as homogenizers, beads mills, ball mills, basket mills, attrition mills, universal stirrers, clear mixers or TK mixers This can be done through a method using [98] Through the above processes, the surface of the active material core 30 and the conductive material 10 are connected to each other through the organic connector 20 , and two or more conductive materials are connected to each other by the organic connector 20 and the elastic unit 40 . connected to form a conductive network. In the conductive network formed above, the conductive material may provide continuous electrical conductivity even when the volume changes due to charging and discharging of the negative electrode active material, and may exhibit improved lifespan characteristics. [99] [100] [101] In addition, the present invention provides a negative electrode and a lithium secondary battery comprising the above-described negative electrode active material. [102] Specifically, the negative electrode current collector; and a negative active material layer formed on the negative electrode current collector and including a negative electrode material, wherein the negative electrode material includes the negative electrode active material described above. [103] The negative current collector is not particularly limited as long as it has high conductivity without causing a chemical change in the battery. Specifically, the negative electrode current collector may be copper, stainless steel, aluminum, nickel, titanium, calcined carbon, one in which the surface of copper or stainless steel is surface-treated with carbon, nickel, titanium, silver, etc., aluminum-cadmium alloy, etc. may be used. have. [104] The negative electrode current collector may typically have a thickness of 3 to 100 μm. [105] The negative electrode current collector may form fine concavities and convexities on the surface to strengthen the bonding strength of the negative electrode active material. For example, the negative electrode current collector may be used in various forms such as a film, a sheet, a foil, a net, a porous body, a foam, a nonwoven body, and the like. [106] The negative electrode active material layer is formed on the negative electrode current collector, and includes a negative electrode material including the negative electrode active material described above. [107] The negative electrode material may further include a carbon-based active material together with the negative electrode active material described above. The carbon-based active material may impart excellent cycle characteristics or battery life performance to the negative electrode or secondary battery of the present invention. [108] Specifically, the carbon-based active material includes at least one selected from the group consisting of graphite, artificial graphite, natural graphite, hard carbon, soft carbon, carbon black, acetylene black, Ketjen black, super P, graphene, and fibrous carbon. and preferably at least one selected from the group consisting of graphite, artificial graphite, and natural graphite. [109] The anode material may be included in the anode active material layer in an amount of 60 wt% to 99 wt%, preferably 65 wt% to 90 wt%. [110] The negative active material layer includes a binder. The binder is polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-co-HFP), polyvinylidene fluoride (polyvinylidenefluoride), polyacrylonitrile (polyacrylonitrile), polyacrylamide (polyacrylamide) polymethylmethacrylic Polymethylmethacrylate, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene monomer (EPDM) ), sulfonated EPDM, styrene butadiene rubber (SBR), fluororubber, polyacrylic acid, and at least one selected from the group consisting of a material in which hydrogen is substituted with Li, Na or K, etc. and may also include various copolymers thereof. [111] The binder may be included in the anode active material layer in an amount of 0.5 wt% to 30 wt%, preferably 5 wt% to 25 wt%. [112] The negative active material layer may further include an additional conductive material. [113] The additional conductive material is not particularly limited as long as it has conductivity without causing a chemical change in the battery. For example, graphite such as natural graphite or artificial graphite; carbon black, such as carbon black, acetylene black, Ketjen black, channel black, farness black, lamp black, and thermal black; conductive fibers such as carbon fibers and metal fibers; conductive tubes such as carbon nanotubes; metal powders such as fluorocarbon, aluminum, and nickel powder; conductive whiskers such as zinc oxide and potassium titanate; conductive metal oxides such as titanium oxide; and at least one selected from the group consisting of conductive materials such as polyphenylene derivatives, preferably graphite such as natural graphite or artificial graphite; and carbon black such as carbon black, acetylene black, Ketjen black, channel black, farness black, lamp black, thermal black, etc.; at least one selected from the group consisting of may be used. [114] The additional conductive material may be included in the negative active material layer in an amount of 0.5 wt% to 25 wt%, preferably 3 wt% to 20 wt%. [115] The thickness of the negative active material layer may be 10 μm to 200 μm, preferably 20 μm to 150 μm. [116] [117] The negative electrode may be prepared by coating a negative electrode slurry including a negative electrode material, a binder, and a conductive material and/or a solvent for forming the negative electrode slurry on the negative electrode current collector, followed by drying and rolling. [118] The solvent for forming the negative electrode slurry includes an organic solvent such as NMP (N-methyl pyrrolidone), DMF (dimethyl formamide), acetone, dimethyl acetamide, or water, and these solvents are used alone or in a mixture of two or more. can be used by [119] [120] In addition, the present invention is the above-described negative electrode; an anode opposite the cathode; a separator interposed between the negative electrode for the lithium secondary battery and the positive electrode; and an electrolyte; provides a lithium secondary battery comprising. [121] The negative electrode has been described above. [122] The positive electrode is formed on a positive electrode current collector and the positive electrode current collector, and may include a positive electrode active material layer including the positive electrode active material. [123] In the positive electrode, the positive electrode current collector is not particularly limited as long as it has conductivity without causing a chemical change in the battery, for example, stainless steel, aluminum, nickel, titanium, calcined carbon, or carbon on the surface of aluminum or stainless steel. , nickel, titanium, silver or the like surface-treated may be used. In addition, the positive electrode current collector may typically have a thickness of 3 μm to 500 μm, and may increase the adhesion of the positive electrode active material by forming fine irregularities on the surface of the current collector. For example, it may be used in various forms, such as a film, a sheet, a foil, a net, a porous body, a foam, a non-woven body. [124] The positive active material may be a commonly used positive active material. Specifically, the positive active material is lithium cobalt oxide (LiCoO 2 ), lithium nickel oxide (LiNiO 2 ), Li[Ni x Co y Mn z Mv]O 2 (wherein M is from the group consisting of Al, Ga and In) any one selected or two or more of these elements: 0.3≤x<1.0, 0≤y, z≤0.5, 0≤v≤0.1, x+y+z+v=1), Li (Li a M ba-b' M' b' )O 2-c A c(Wherein, 0≤a≤0.2, 0.6≤b≤1, 0≤b'≤0.2, 0≤c≤0.2; M is Mn and Ni, Co, Fe, Cr, V, Cu, Zn and Ti. It includes at least one member selected from the group consisting of; M' is at least one member selected from the group consisting of Al, Mg and B, and A is at least one member selected from the group consisting of P, F, S and N a layered compound such as ) or a compound substituted with one or more transition metals; Lithium manganese oxides such as Formula Li 1+y Mn 2-y O 4 (where y is 0 to 0.33), LiMnO 3 , LiMn 2 O 3 , and LiMnO 2 ; lithium copper oxide (Li 2 CuO 2 ); LiV 3 O 8 , LiFe 3 O 4 , V 2 O 5 , Cu vanadium oxides such as 2 V 2 O 7 ; Ni site-type lithium nickel oxide represented by the formula LiNi 1-y M y O 2 (wherein M = Co, Mn, Al, Cu, Fe, Mg, B or Ga, and y is 0.01 to 0.3); Formula LiMn 2-y M y O 2 (wherein M = Co, Ni, Fe, Cr, Zn or Ta, and y is 0.01 to 0.1) or Li 2 Mn 3 MO 8 (where M = Fe, Co, lithium manganese composite oxide represented by Ni, Cu or Zn; LiMn 2 O 4 in which a part of Li in the formula is substituted with an alkaline earth metal ion ; disulfide compounds; Fe 2 (MoO 4 ) 3These etc. are mentioned, However, It is not limited only to these. The anode may be Li-metal. [125] The positive electrode active material layer may include a positive electrode conductive material and a positive electrode binder together with the above-described positive active material. [126] In this case, the positive electrode conductive material is used to impart conductivity to the electrode, and in the configured battery, it can be used without any particular limitation as long as it has electronic conductivity without causing chemical change. Specific examples include graphite such as natural graphite and artificial graphite; carbon-based materials such as carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, summer black, and carbon fiber; metal powders or metal fibers such as copper, nickel, aluminum, and silver; conductive whiskeys such as zinc oxide and potassium titanate; conductive metal oxides such as titanium oxide; or a conductive polymer such as a polyphenylene derivative, and the like, and one or a mixture of two or more thereof may be used. [127] In addition, the positive electrode binder serves to improve adhesion between the positive electrode active material particles and the adhesive force between the positive electrode active material and the positive electrode current collector. Specific examples include polyvinylidene fluoride (PVDF), vinylidene fluoride-hexafluoropropylene copolymer (PVDF-co-HFP), polyvinyl alcohol, polyacrylonitrile, carboxymethyl cellulose (CMC) ), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene polymer (EPDM), sulfonated-EPDM, styrene butadiene rubber (SBR), fluororubber, or various copolymers thereof, and any one of them or a mixture of two or more thereof may be used. [128] [129] The separator separates the anode and the anode and provides a passage for lithium ions to move, and it can be used without any particular limitation as long as it is normally used as a separator in a secondary battery. Excellent is preferred. Specifically, a porous polymer film, for example, a porous polymer film made of a polyolefin-based polymer such as an ethylene homopolymer, a propylene homopolymer, an ethylene/butene copolymer, an ethylene/hexene copolymer, and an ethylene/methacrylate copolymer, or these A laminate structure of two or more layers of may be used. In addition, a conventional porous nonwoven fabric, for example, a nonwoven fabric made of high melting point glass fiber, polyethylene terephthalate fiber, or the like may be used. In addition, in order to secure heat resistance or mechanical strength, a coated separator containing a ceramic component or a polymer material may be used, and may optionally be used in a single-layer or multi-layer structure. [130] The electrolyte may include, but is not limited to, an organic liquid electrolyte, an inorganic liquid electrolyte, a solid polymer electrolyte, a gel polymer electrolyte, a solid inorganic electrolyte, and a molten inorganic electrolyte, which can be used in the manufacture of a lithium secondary battery. [131] Specifically, the electrolyte may include a non-aqueous organic solvent and a metal salt. [132] As the non-aqueous organic solvent, for example, N-methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, gamma-butylolactone, 1,2-dimethyl ethoxyethane, tetrahydroxy franc, 2-methyl tetrahydrofuran, dimethyl sulfoxide, 1,3-dioxolane, formamide, dimethylformamide, dioxolane, acetonitrile, nitromethane, methyl formate, Methyl acetate, phosphoric acid triester, trimethoxymethane, dioxolane derivative, sulfolane, methyl sulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbonate derivative, tetrahydrofuran derivative, ether, pyropion An aprotic organic solvent such as methyl acid or ethyl propionate may be used. [133] In particular, among the carbonate-based organic solvents, ethylene carbonate and propylene carbonate, which are cyclic carbonates, are highly viscous organic solvents and have a high dielectric constant and thus well dissociate lithium salts. If the same low-viscosity, low-dielectric constant linear carbonate is mixed in an appropriate ratio, an electrolyte having high electrical conductivity can be prepared, which can be used more preferably. [134] A lithium salt may be used as the metal salt, and the lithium salt is a material that is easily soluble in the non-aqueous electrolyte. For example, as an anion of the lithium salt , F - , Cl - , I - , NO 3 - , N(CN) ) 2 - , BF 4 - , ClO 4 - , PF 6 - , (CF 3 ) 2 PF 4 - , (CF 3 ) 3 PF 3 - , (CF 3 ) 4 PF 2 - , (CF 3 )) 5 PF - , (CF 3 ) 6 P - , CF 3 SO 3 - , CF 3 CF 2 SO 3 - , (CF 3 SO 2 ) 2 N - , (FSO 2 ) 2 N - , CF 3 CF 2 ( CF 3 ) 2 CO - , (CF 3 )SO 2 ) 2 CH - , (SF 5 ) 3 C - , (CF 3 SO 2 ) 3 C - , CF 3 (CF 2 ) 7 SO 3 - , CF 3 CO 2 - , CH 3 CO 2 - , SCN - and (CF 3 CF 2 SO 2 ) 2At least one selected from the group consisting of N − may be used. [135] In addition to the electrolyte components, the electrolyte includes, for example, haloalkylene carbonate-based compounds such as difluoroethylene carbonate, pyridine, tri Ethyl phosphite, triethanolamine, cyclic ether, ethylene diamine, n-glyme, hexaphosphoric acid triamide, nitrobenzene derivative, sulfur, quinone imine dye, N-substituted oxazolidinone, N,N-substituted imida One or more additives such as jolidine, ethylene glycol dialkyl ether, ammonium salt, pyrrole, 2-methoxy ethanol or aluminum trichloride may be further included. [136] [137] According to another embodiment of the present invention, there is provided a battery module including the secondary battery as a unit cell and a battery pack including the same. Since the battery module and the battery pack include the secondary battery having high capacity, high rate-rate characteristic and cycle characteristic, a medium-to-large device selected from the group consisting of an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a system for power storage can be used as a power source for [138] [139] Example [140] Hereinafter, a preferred embodiment is presented to help the understanding of the present invention, but the embodiment is only illustrative of the present description, and it is apparent to those skilled in the art that various changes and modifications are possible within the scope and technical spirit of the present description, It goes without saying that such variations and modifications fall within the scope of the appended claims. [141] [142] Example 1: Si/PBA/SWCNT 1%-crosslink [143] 0.1 g of 1-pyrenebutyric acid (PBA) was dissolved in 100 g of N-methylpyrrolidone solvent. 0.01 g of single-walled carbon nanotubes (SWCNT) was added to the prepared solution, and probe-type sonication was performed for 30 minutes. Next, 1 g of Si powder was put into the prepared solution and ultrasonically dispersed for 30 minutes, followed by stirring for 1 hour. 0.2 g of 2,4-diisocyanate toluene-terminated poly(propylene glycol) as an elastic unit was added to the thus prepared dispersion solution and stirred at 80° C. for 24 hours. [144] In the solution, the carboxylate group of 1-pyrene butyric acid reacts and bonds with a hydroxyl group on the surface of the active material core, and the hydrophobic group (pyrene group) of 1-pyrene butyric acid binds to the conductive material by van der Waals attraction. and the active material surface were connected to each other. In addition, since the carboxylate group of 1-pyrenebutyric acid that did not react with the hydroxyl group of the active material core reacts with the isocyanate group of the elastic unit to form an amide bond, two or more conductive materials were connected to each other through the elastic unit to form a conductive network. [145] The reaction solution was filtered, washed and dried to prepare the negative active material of Example 1 (Si/PBA/SWCNT 1%-crosslink). The "SWCNT 1%" means that the content of SWCNT with respect to the active material core (Si) is 1% by weight. [146] A negative electrode for battery performance evaluation was prepared using the above negative active material as follows. Si/PBA/SWCNT 1%-Crosslink:Super-C:Polyacrylic acid (PAA) was prepared as a slurry by adding distilled water in a weight ratio of 70:20:10, and then it was applied to a copper foil and applied at about 60°C for 6 hours. After pre-drying, it was completely dried in a vacuum oven at 130° C. for 12 hours to prepare a negative electrode. [147] [148] Example 2: Si/PBA/SWCNT 0.1%-crosslink [149] In Example 1, 0.01 g of PBA was added instead of 0.1 g, 0.001 g of SWCNT was added instead of 0.01 g, and 0.02 g of 2,4-diisocyanate toluene terminated poly(propylene glycol) was added instead of 0.2 g. An anode active material of Example 2 was prepared in the same manner as in Example 1, except for one (Si/PBA/SWCNT 0.1%-crosslink). The "SWCNT 0.1%" means that the content of SWCNT with respect to the active material core (Si) is 0.1% by weight. [150] A negative electrode was prepared in the same manner as in Example 1, except that the negative active material prepared above was used. [151] [152] Example 3: Si/PBA/SWCNT 10%-crosslink [153] In Example 1, 1 g of PBA was added instead of 0.1 g, SWCNT was added 0.1 g instead of 0.01 g, and 2,4-diisocyanate toluene terminated poly (propylene glycol) was added 2 g instead of 0.2 g. Except that, the negative active material of Example 3 was prepared in the same manner as in Example 1 (Si/PBA/SWCNT 10%-crosslink). The “SWCNT 10%” means that the content of SWCNTs with respect to the active material core (Si) is 10% by weight. [154] A negative electrode was prepared in the same manner as in Example 1, except that the negative active material prepared above was used. [155] [156] Comparative Example 1: [157] In Example 1, 0.1 g of 1-pyrenebutyric acid (PBA) was dissolved in 100 g of N-methylpyrrolidone solvent. After putting 0.01 g of single-walled carbon nanotubes (SWCNT) in the prepared solution, and performing probe-type sonication for 30 minutes, 1 g of Si powder was put into the prepared solution and ultrasonically dispersed for 30 minutes. , was stirred for 1 hour. The dispersion solution prepared in this way was filtered, and washing was performed through filtration while pouring water several times. The obtained material was dried in a vacuum oven at 130° C. for 12 hours to obtain a negative active material (Si/PBA/SWCNT 1%) according to Comparative Example 1. The "SWCNT 1%" means that the content of SWCNT with respect to the active material core (Si) is 1% by weight. [158] A negative electrode was prepared in the same manner as in Example 1, except that the negative active material obtained above was used. [159] [160] Comparative Example 2: [161] Si:SWCNT:2,4-diisocyanate toluene terminated poly(propylene glycol):Super-C:PAA was added to water in a weight ratio of 70:1:10:10:9:10 and stirred to prepare a negative electrode slurry. This was applied to copper foil, pre-dried at about 60° C. for 6 hours, and then completely dried in a vacuum oven at 130° C. for 12 hours to prepare a negative electrode. [162] In Comparative Example 2, since the organic connector PBA was not added, the bonding between the conductive material and the active material core surface according to the present invention and the conductive network formation by the elastic unit were not formed. [163] [164] Experimental example [165] Coin-type half-cells were prepared using the negative electrodes prepared in Examples 1 to 3 and Comparative Examples 1 and 2 above. A metal lithium foil was used as the positive electrode, and a polyethylene separator was interposed between the negative electrode and the positive electrode to prepare an electrode assembly. [166] After the electrode assembly was placed in a battery case, an electrolyte solution containing 1M LiPF 6 was injected into a non-aqueous solvent mixed in ethylene carbonate:diethyl carbonate=1:2 (volume ratio) to prepare a coin-type half-cell. [167] [168] Experimental Example 1: Evaluation of initial discharge capacity and initial efficiency [169] The charging and discharging characteristics of the coin-type half-cells prepared using the negative electrodes prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were evaluated. [170] Charging/discharging was carried out at a current density of 0.1 C/0.1 C in the first charge/discharge, and a current density of 0.5 C/0.5 C in subsequent charge/discharge cycles, and the detailed conditions are as follows. At the time of charging, it was charged in the CC mode up to 50% of the 1C discharge capacity at the specified current density, and during discharging, the discharge was completed in the CC mode to 1 V at the specified current density. [171] The initial discharge capacity and initial efficiency (initial discharge capacity/initial charge capacity × 100) during the first charge/discharge of Examples and Comparative Examples are shown in Table 1 below. [172] [173] [Table 1] [174] [175] Referring to Table 1, it can be seen that the secondary batteries of Examples 1 to 3 have superior initial efficiency compared to Comparative Examples. [176] [177] Experimental Example 2: Cycle capacity maintenance rate evaluation [178] The charging and discharging characteristics of the coin-type half-cells prepared using the negative electrodes prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were evaluated. [179] Charging/discharging was carried out at a current density of 0.1 C/0.1 C in the first charge/discharge, and a current density of 0.5 C/0.5 C in subsequent charge/discharge cycles, and the detailed conditions are as follows. At the time of charging, it was charged in the CC mode up to 50% of the 1C discharge capacity at the specified current density, and during discharging, the discharge was completed in the CC mode to 1 V at the specified current density. The capacity retention rate according to the cycle is shown in FIG. 6 . [180] [181] Referring to FIG. 6 , in the case of Examples 1 to 3, it can be seen that cycle life characteristics are significantly improved compared to Comparative Examples 1 to 2. [182] In the case of Comparative Example 1, since the connection between the conductive materials by the elastic unit was not made to the used negative active material, it is difficult to provide continuous and elastic conductivity according to the volume change of the active material core, so it is thought that the cycle capacity maintenance rate is lowered. . [183] In the case of Comparative Example 2, since the organic connector component itself was not used, a conductive network could not be formed by the connection between the conductive material and the active material core and the connection between the conductive material and the conductive material, so the cycle life performance was significantly reduced. . [184] [185] [Explanation of code] [186] 10: conductive material [187] 20: organic linkage [188] 25: combination of active material core/organic linkage/conductive material [189] 30: active material core [190] 35: functional group on the surface of the active material core [191] 40: elastic unit [192] 45: Combination of conductive material / organic connecting body / elastic unit / organic connecting body / conductive material Claims [Claim 1] an active material core capable of intercalating and deintercalating lithium ions; a plurality of conductive materials positioned on the surface of the active material core; a plurality of organic linkages comprising a hydrophobic group and a polar functional group bonded to the hydrophobic group; and an elastic unit; wherein the elastic unit includes an elastic portion having two or more binding sites, and a functional group bonded to the binding site of the elastic portion and capable of reacting with a polar functional group of the organic linkage, wherein the plurality of Among the organic linkages of Anode active material combined with. [Claim 2] The negative active material of claim 1 , wherein the conductive material includes at least one of a linear conductive material and a planar conductive material, and two or more conductive materials among a plurality of conductive materials are connected to each other through the elastic unit. [Claim 3] The method according to claim 2, wherein the linear conductive material is at least one selected from the group consisting of carbon fibers, carbon nanofibers (CNF), metal fibers, metal nanotubes, carbon nanotubes (CNTs), and conductive whiskers, and the planar conductive material comprises: At least one negative electrode active material selected from the group consisting of graphene, a metal thin film, and mxene. [Claim 4] The negative active material of claim 1, wherein the conductive material is included in an amount of 0.05 to 15 parts by weight based on 100 parts by weight of the active material core. [Claim 5] The negative active material of claim 1 , wherein the hydrophobic group of the organic linkage includes at least one of a cyclic group having a π electron conjugated structure and an alkyl group having 3 to 20 carbon atoms. [Claim 6] The method of claim 5, wherein the cyclic group of the π electron conjugated structure is benzene, pyrene, naphthalene, anthracene, benzopyrene, phenanthrene, fluoranthene, chrysene, perylene, benz[a]anthracene, acenaphthylene, coronene, A negative active material comprising at least one selected from the group consisting of triphenylene and tetracene. [Claim 7] The negative active material according to claim 5, wherein the cyclic group of the π electron conjugate structure is a polycyclic cyclic group in which four or more rings are bonded. [Claim 8] According to claim 1, wherein the polar functional group of the organic linkage is a carboxylic acid group; phosphonic acid group; sulfonic acid group; and an alkyl group having 1 to 8 carbon atoms substituted with a carboxylic acid group, a phosphonic acid group, or a sulfonic acid group; at least one negative electrode active material selected from the group consisting of. [Claim 9] The negative active material of claim 1 , wherein the organic compound is at least one selected from the group consisting of 1-pyreneacetic acid, 1-pyrenecarboxylic acid, 1-pyrenebutyric acid, dodecylsulfonic acid, and dodecylbenzenesulfonic acid. [Claim 10] The negative electrode of claim 1, wherein the active material core in which lithium ions can be occluded and released is Si, SiO x (0