Title of Invention: Secondary battery including electrode tabs with insulating coating layer Technical field [One] The present invention relates to a secondary battery including an electrode tab provided with an insulating coating layer, and more particularly, to a secondary battery including an electrode tab provided with an insulating coating layer containing a binder having a low electrolyte absorption rate. [2] This application is an application for claiming priority for Korean Patent Application No. 10-2018-0001303 filed on January 4, 2018, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference. Background [3] As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing, and accordingly, many studies on batteries that can meet various demands are being conducted. [4] Typically, in terms of the shape of the battery, the demand for prismatic batteries and pouch-type batteries that can be applied to products such as mobile phones is high due to its thin thickness. Demand for lithium secondary batteries is high. [5] One of the major research tasks in these secondary batteries is to improve safety. In general, lithium secondary batteries are subject to high temperature and high pressure inside the battery that may be caused by abnormal operating conditions of the battery such as internal short circuit, overcharging condition exceeding the allowed current and voltage, exposure to high temperature, and impact by dropping. This may cause battery explosion. As one such case, there is a possibility that an internal short circuit may occur in the case of an impact such as a fall or an external force in the secondary battery. [6] 1 schematically shows a general structure of a pouch-type secondary battery. [7] Referring to FIG. 1, the secondary battery 10 includes an electrode assembly 100, a battery case 200, electrode tabs 10 and 11, and electrode leads 20 and 21. [8] The electrode assembly 100 includes a positive electrode plate, a negative electrode plate, and a separator. In the electrode assembly 100, a positive electrode plate and a negative electrode plate may be sequentially stacked with a separator interposed therebetween. The electrode assembly 100 is typically a jelly-roll (winding type) electrode assembly having a structure in which long sheet-shaped anodes and cathodes are wound with a separator interposed therebetween, a plurality of anodes and cathodes cut in units of a predetermined size. Stacked (stacked) electrode assembly sequentially stacked with a separator interposed therebetween, a structure in which bi-cells or full cells stacked with a predetermined unit of anodes and cathodes stacked with a separator interposed therebetween And a stack/folding type electrode assembly. [9] The battery case 200 may be formed in a size capable of accommodating the electrode assembly 100, the electrode tabs 10 and 11 to be described later, and the electrode leads 20 and 21. [10] The electrode tabs 10 and 11 extend from the electrode assembly 100. For example, the positive electrode tab 10 extends from the positive electrode plate, and the negative electrode tab 11 extends from the negative electrode plate. Here, when the electrode assembly 100 is configured in a state in which a plurality of positive plates and a plurality of negative plates are stacked, the electrode tabs 10 and 11 extend from each of the positive and negative plates. At this time, the electrode tabs 10 and 11 are not directly exposed to the outside of the battery case 200, but are connected to other components such as the electrode leads 20 and 21 to be exposed to the outside of the battery case 200. have. [11] The electrode leads 20 and 21 are partially electrically connected to the electrode tabs 10 and 11 respectively extending from the positive or negative electrode plate. At this time, the electrode leads 20 and 21 may be bonded to the electrode tabs 10 and 11 by a method such as welding, which is indicated by a shade W in FIG. 1. For example, the bonding method of the electrode leads 20 and 21 and the electrode tabs 10 and 11 may be a method such as general resistance welding, ultrasonic welding, laser welding, or rivet. In addition, the electrode leads 20 and 21 may further include sealing tapes 30 and 31 at a portion connected to the exposed portion. [12] In an embodiment in which a plurality of positive electrodes and negative electrodes are used to form a pouch-type secondary battery, positive electrode tabs and negative electrode tabs extending from each of them are bonded to the electrode lead in a conventional manner in the art. [13] In a secondary battery having such a configuration, in a thermal abuse test, when the temperature of the periphery of the electrode tab, for example, the positive electrode tab, rises, the separator in the corresponding part shrinks and the positive electrode tab and the charged negative electrode come into contact with each other, the possibility of ignition is high. In particular, heat generation of the electrode tab portion is serious during high rate charging and discharging, and thus safety enhancement of the portion is required. [14] In order to solve the internal short circuit of the battery, a method of attaching an insulating member to an electrode tab has been proposed. The insulating member is known to be formed by coating a slurry obtained by dispersing a mixture of an insulating binder and an inorganic filler for image recognition in a solvent on the electrode tab portion. The binder contained in such an insulating member absorbs the electrolyte during the charging/discharging process of the secondary battery and becomes soft, thereby weakening the adhesive strength of the insulating member, and also operating the thermal & mechanical abuse mode at the same time. In this case, there is a problem in that the electrode tab portion is deformed and the insulating member is detached. Detailed description of the invention Technical challenge [15] In order to solve the above-described problems, the present invention is to provide a secondary battery that minimizes internal short-circuit and enhances safety, including an electrode tab provided with an insulating coating layer that does not cause detachment due to improved adhesion to the electrode tab. Means of solving the task [16] An aspect of the present invention provides a secondary battery according to the following embodiments. [17] The first embodiment, [18] An electrode assembly including an electrode tab extending from an electrode current collector, wherein the electrode tab has an insulating coating layer including an inorganic filler and a binder, and the binder has an absorption rate (uptake) of more than 0% for an electrolyte solution. It is less than 50%, and the absorption rate relates to a secondary battery that is measured by the following method: [19] An organic solvent in which ethylene carbonate, propylene carbonate and diethyl carbonate are mixed; And a lithium salt; preparing an electrolyte solution containing; Forming the binder into a film, cutting it into a predetermined size to measure the weight before immersion, immersing the cut film in the electrolyte for 1 hour at room temperature, taking it out, and measuring the weight after immersion of the binder; And calculating the electrolyte absorption rate of the binder using the following Equation 1 [20] [Equation 1] [21] [22] The second embodiment includes an electrode assembly including an electrode tab extending from an electrode current collector, wherein the electrode tab includes an insulating coating layer including an inorganic filler and a binder, and the binder has an absorption rate ( uptake) is greater than 0% and less than 150%, and the absorption rate is measured by the following method: [23] An organic solvent in which ethylene carbonate, propylene carbonate, and propyl propionate are mixed; And a lithium salt; preparing an electrolyte solution containing; Forming the binder into a film, cutting it into a predetermined size to measure the weight before immersion, immersing the cut film in the electrolyte for 1 hour at room temperature, taking it out, and measuring the weight after immersion of the binder; And calculating the electrolyte absorption rate of the binder using the following Equation 1 [24] [Equation 1] [25] [26] In the third embodiment, in the first or second embodiment, [27] It relates to a secondary battery in which the content of ethylene carbonate is 20 parts by weight or more based on 100 parts by weight of the total organic solvent. [28] In the fourth embodiment, in the third embodiment, [29] It relates to a secondary battery in which the mixed weight ratio of ethylene carbonate, propylene carbonate, and diethyl carbonate is 30:20:50. [30] In the fifth embodiment, in the third embodiment, [31] It relates to a secondary battery in which the mixed weight ratio of the ethylene carbonate, propylene carbonate, and propyl propionate is 30:10:60. [32] In the sixth embodiment, in any one of the first to fifth embodiments, [33] The binder relates to a secondary battery comprising a styrene-butadiene-based rubber including a repeating unit derived from a monomer having a crosslinkable group. [34] In the seventh embodiment, in any one of the first to sixth embodiments, [35] The binder relates to a secondary battery comprising a styrene-butadiene rubber containing 12 parts by weight or less of a repeating unit derived from an acrylic acid (AA) monomer. [36] In the eighth embodiment, in the seventh embodiment, [37] The binder relates to a secondary battery which is a styrene-butadiene-acrylic acid copolymer. [38] In the ninth embodiment, in any one of the first to eighth embodiments, [39] The binder relates to a secondary battery comprising a fluorinated binder polymer containing 90 parts by weight or more of a repeating unit derived from a vinylidene fluoride (VdF) monomer. [40] In the tenth embodiment, in the ninth embodiment, [41] The fluorinated binder polymer relates to a secondary battery of polyvinylidene fluoride. [42] In the eleventh embodiment, in any one of the first to tenth embodiments, [43] The insulating coating layer relates to a secondary battery comprising an inorganic filler and a binder in a weight ratio of 5:95 to 80:20. [44] In the twelfth embodiment, in any one of the first to eleventh embodiments, [45] The inorganic filler is SiO 2 , TiO 2 , Al 2 O 3 , AlOOH, γ-AlOOH, ZrO 2 , SnO 2 , CeO 2 , MgO, CaO, ZnO, Y 2 O 3 , Pb(Zr,Ti)O 3 ( PZT), Pb 1 - x La x Zr 1 - y Ti y O 3 (PLZT), PB(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT), BaTiO 3 , hafnia (HfO 2 ) , SrTiO 3 It relates to a secondary battery comprising a mixture thereof. [46] In the thirteenth embodiment, in any one of the first to twelfth embodiments, [47] The insulating coating layer relates to a secondary battery further comprising a dispersant. [48] In the 14th embodiment, in the 13th embodiment, [49] The insulating coating layer relates to a secondary battery comprising a dispersant in an amount of 0.1 to 5% by weight relative to the inorganic filler. [50] The fifteenth embodiment, in any one of the first to fourteenth embodiments, [51] The electrode tab relates to a secondary battery that is a positive electrode tab. Effects of the Invention [52] In the secondary battery according to the present invention, since the insulating coating layer provided on the electrode tab contains a binder having a low electrolyte absorption rate, adhesion is improved so that separation of the insulating coating layer from the electrode tab does not occur, and excellent insulation is maintained therefrom. Safety can be secured by minimizing the internal short circuit. [53] Brief description of the drawing [54] 1 is a cross-sectional view schematically showing a general structure of a conventional pouch-type secondary battery. [55] 2 is a schematic cross-sectional view of a secondary battery according to an embodiment of the present invention. [56] Mode for carrying out the invention [57] Hereinafter, the present invention will be described in detail. The terms or words used in the present specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of ​​the present invention based on the principle that there is. Therefore, the embodiments described in the present specification and the configurations described in the drawings are only the most preferred embodiments, and do not represent all of the technical spirit of the present invention, and various equivalents and equivalents that can replace them at the time of application It should be understood that there may be variations. [58] [59] An embodiment of the present invention is an electrode assembly including an electrode tab extending from an electrode current collector, specifically, a positive electrode including a positive electrode tab extending from the positive electrode current collector, and a negative electrode tab extending from the negative electrode current collector. It relates to a secondary battery comprising an electrode assembly including a negative electrode and a separator interposed between the positive electrode and the negative electrode. [60] [61] In one embodiment of the present invention, the electrode tab includes an insulating coating layer containing an inorganic filler and a binder. [62] The binder is a component used for adhesion between inorganic fillers or adhesion between inorganic fillers and electrode tabs, along with a function of imparting insulation, and an uptake of an electrolyte solution is characterized in that it has an absorption rate of more than 0% and less than 50%. At this time, the absorption rate of the binder to the electrolyte is measured by the following method: [63] That is, the water absorption rate is a step of preparing an electrolyte solution containing a lithium salt and an organic solvent in which ethylene carbonate, propylene carbonate, and diethyl carbonate are mixed; The binder was molded into a film and cut into a predetermined size to measure the weight before immersion, and the cut film was immersed in the electrolyte solution at room temperature (25°C) for 1 hour and then taken out, and the weight was measured after immersion of the binder. step; And the measured weight is calculated by using the following equation 1 to calculate the electrolyte absorption rate of the binder: [64] [Equation 1] [65] [66] In one embodiment of the present invention, the absorption rate for the electrolyte may be specifically greater than 0 and less than 50%, or 3 to 47%, or 6 to 47%. [67] In this case, the electrolyte solution may contain 20 parts by weight or more based on 100 parts by weight of the total organic solvent content of ethylene carbonate (EC). [68] In a specific embodiment of the present invention, the ethylene carbonate (EC), propylene carbonate (PC) and diethyl carbonate (DEC) are 30:20:50 to 20:10:70, preferably 30:20:50 It can be mixed in a weight ratio of. [69] In a specific embodiment of the present invention, the secondary battery includes an electrode assembly and an electrolytic solution injected into the electrode assembly, and the electrolytic solution may be the same as the electrolytic solution used for measuring the electrolyte absorption rate. [70] [71] Meanwhile, in order to implement a secondary battery capable of operating at a high voltage, it is suitable to replace diethyl carbonate (DEC) with propyl propionate (PP) among the components of the organic solvent contained in the electrolyte. For example, diethyl carbonate (DEC) accelerates decomposition during high voltage operation, while secondary batteries using an electrolyte containing propyl propionate (PP) in a certain proportion are used at high voltages of 4.25 V or higher, especially 4.4 V or higher without decomposition. Operation is possible. When it is intended to implement a secondary battery capable of operating at a high voltage, the binder exhibits an uptake of more than 0% and less than 150% of the electrolyte, and at this time, the absorption rate of the binder to the electrolyte is measured by the following method: [72] That is, the water absorption rate is a step of preparing an electrolyte solution including a lithium salt and an organic solvent in which ethylene carbonate, propylene carbonate, and propyl propionate are mixed; The binder was molded into a film and cut into a predetermined size to measure the weight before immersion, and the cut film was immersed in the electrolyte solution at room temperature (25°C) for 1 hour and then taken out, and the weight was measured after immersion of the binder. step; And the measured weight is calculated by using the following equation 1 to calculate the electrolyte absorption rate of the binder: [73] [Equation 1] [74] [75] In one embodiment of the present invention, the absorption rate for the electrolyte may be specifically greater than 0 and less than 150%, or 3 to 130%, or 12 to 127%. [76] In this case, the electrolyte solution may contain 20 parts by weight or more based on 100 parts by weight of the total organic solvent content of ethylene carbonate (EC). [77] In a specific embodiment of the present invention, the ethylene carbonate (EC), propylene carbonate (PC) and propylpropionate (PP) are 30:20:50 to 20:10:70, preferably 25:10: It can be mixed in a weight ratio of 65 or 30:10:60. [78] In a specific embodiment of the present invention, the secondary battery includes an electrode assembly and an electrolytic solution injected into the electrode assembly, and the electrolytic solution may be the same as the electrolytic solution used for measuring the electrolyte absorption rate. [79] The electrolyte absorption rate of the binder measured as described above is an index indicating electrolyte resistance, and a binder having a low electrolyte absorption rate exhibits high adhesion even in a wet state of the electrolyte solution. Accordingly, the binder having such a characteristic can alleviate a decrease in adhesion due to the absorption of the electrolyte by the binder included in the insulating coating layer during the charging/discharging process of the secondary battery, thereby suppressing the detachment of the insulating coating layer. On the other hand, the insulating coating layer containing a binder having a high electrolyte absorption rate weakens the adhesion and is likely to be detached from the electrode tab. [80] Examples of the binder having a low electrolyte absorption rate include a styrene-butadiene rubber containing a repeating unit derived from a styrene monomer and a repeating unit derived from a butadiene monomer in a weight ratio of 70:30 to 30:70. Specifically, the styrene-butadiene-based rubber contains a repeating unit derived from a styrene monomer having a hydrophobic group in the above range, so that the absorption rate of the electrolyte may be controlled. [81] In addition, the total weight of the repeating unit derived from the styrene monomer and the repeating unit derived from the butadiene monomo may be 30 to 100% or 30 to 70% by weight based on the total weight of the styrene-butadiene-based rubber, and if this range is satisfied, the electrolyte solution Absorption rate control is possible. [82] Examples of the styrene monomer include styrene, α-methylstyrene, p-methyl styrene, 3-methylstyrene, 4-methylstyrene, 4-propylstyrene, 1-vinylnaphthalene, 4-cyclohexylstyrene, 4-(p-methylphenyl). ) Styrene, 1-vinyl-5-hexylnaphthalene, derivatives thereof, and mixtures thereof. Examples of the butadiene monomer include 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-butadiene, derivatives thereof, and mixtures thereof. [83] If necessary, the styrene-butadiene-based rubber may further contain a repeating unit derived from a monomer having a crosslinkable group. At this time, the repeating unit derived from the monomer having a crosslinkable group is preferably contained in an amount of 12 parts by weight or less with respect to the total weight of the styrene-butadiene rubber in order to reduce the absorption rate of the electrolyte. [84] In one embodiment of the present invention, the binder may include a styrene-butadiene rubber containing 12 parts by weight or less of a repeating unit derived from an acrylic acid (AA) monomer. As described above, when the content of the repeating unit derived from the acrylic acid monomer is 12 parts by weight or less, the electrolyte absorption rate is low, so that the problem of decomposition of the positive electrode at a high potential can be reduced. [85] Specifically, the binder may be a styrene-butadiene-acrylic acid copolymer. [86] In one embodiment of the present invention, the binder may include a fluorinated binder polymer containing 90 parts by weight or more, or 95 parts by weight or more of a repeating unit derived from a vinylidene fluoride (VdF) monomer. . As the fluorinated binder polymer contains the vinylidene fluoride monomer in the above numerical range, it is possible to control the absorption rate of the binder to the electrolyte solution and reduce the problem of decomposition of the positive electrode at a high potential. [87] Specifically, the fluorinated binder polymer may be polyvinylidene fluoride. [88] [89] In one embodiment of the present invention, the insulating coating layer may be formed by coating an electrode tab with a slurry containing an inorganic filler and an additional dispersant if necessary, together with a binder having the above-described configuration. [90] The inorganic filler functions to express color to enable image recognition of the insulating coating layer, and makes it possible to easily check the position, size, and thickness of the insulating coating layer provided on the electrode tab with the naked eye. Non-limiting examples of such inorganic fillers include SiO 2 , TiO 2 , Al 2 O 3 , AlOOH, γ-AlOOH, ZrO 2 , SnO 2 , CeO 2 , MgO, CaO, ZnO, Y 2 O 3 , Pb(Zr, Ti)O 3 (PZT), Pb 1 - x La x Zr 1 - y Ti y O 3 (PLZT), PB(Mg 1/3 Nb 2/3)O 3 -PbTiO 3 (PMN-PT), BaTiO 3 , hafnia (HfO 2 ), SrTiO 3 , and mixtures thereof. [91] In the insulating coating layer of the present invention, the inorganic filler and the binder may be used in a weight ratio of 5:95 to 80:20 or 10:90 to 50:50. When the above range is satisfied, it is advantageous in terms of adhesion between inorganic fillers, adhesion between the insulating coating layer and the electrode tab, and a desired insulating effect. [92] [93] The dispersant is a component that improves the stability of the slurry by adsorbing to the inorganic filler in the slurry for forming the insulating coating layer to assist the dispersion of inorganic matter. Here, the term'slurry stability' is understood to mean a property in which the inorganic filler contained in the slurry does not settle for a long time after the slurry is applied and is uniformly dispersed and distributed throughout the slurry. In the above,'long time' may mean, for example, a period until the slurry is dried. [94] Cellulose-based compounds may be exemplified as such dispersants, and non-limiting examples include cation-substituted compounds such as carboxyl methyl cellulose, carboxylethyl cellulose or derivatives, such as ammonium ions and monovalent metal ions thereof. Can be mentioned. [95] In the insulating coating layer of the present invention, the dispersant may be used in an amount of 0.1 to 5% by weight relative to the inorganic filler. When the above range is satisfied, deterioration of coating properties due to increase in viscosity can be prevented, and rapid sedimentation of the inorganic filler can be suppressed. [96] On the other hand, as a solvent or dispersion medium used in the slurry for forming the insulating coating layer, water; Alcohols such as methanol, ethanol, propanol, and butanol; Ketones such as acetone and kenyl ethyl ketone; Ethers such as methyl ethyl ether, diethyl ether, and diisoamyl ether; Lactones such as gamma-butyrolactone; N-methyl-2-pyrrolidone (NMP); Lactams such as beta-lactam; Cyclic aliphatic compounds such as cyclopentane and cyclohexane; Aromatic hydrocarbons such as benzene and toluene; Esters, such as methyl lactate and ethyl lactate, can be used. Among these, in particular, water may be suitably used as an eco-friendly dispersion medium. In addition, N-methyl-2-pyrrolidone (NMP) having similarity to the conventional anode coating may be suitably used. The content of the solvent is not particularly limited, but is determined in consideration of the dispersibility of the inorganic filler, ease of coating, and drying time. [97] In one embodiment of the present invention, the insulating coating layer is formed by applying and drying the electrode active material layer slurry on the electrode current collector to form the electrode active material layer, and then applying and drying the insulating coating layer slurry on the electrode tab portion of the electrode current collector. Can be formed. [98] Alternatively, in one embodiment of the present invention, the insulating coating layer is formed by first applying and drying the insulating coating slurry on the electrode tab portion of the electrode current collector to form an insulating coating layer, and then forming the insulating coating layer on the electrode current collector. The electrode active material layer may be formed by applying and drying the slurry for the electrode active material layer on the remaining portions that have not been formed. [99] Further, in one embodiment of the present invention, the insulating coating layer includes a slurry for an insulating coating layer on the electrode tab portion of the electrode current collector, and for the electrode active material layer on the remaining portion where the insulating coating layer is not formed in the electrode current collector. It can also be produced by a method of simultaneously drying and applying the slurry. [100] Coating methods for forming the insulating coating layer include dipping, spray coating, spin coating, roll coating, die coating, and gravure printing. , Bar coating, etc. may be performed, but is not limited thereto. [101] [102] In one embodiment of the present invention, the insulating coating layer is preferably formed to be thinner than the active material layer of each electrode. For example, the thickness of the insulating coating layer may be determined in the range of 5 to 100% or 10 to 50% of the thickness of the active material layer. When the insulating coating layer is formed thinner than the lower limit, it is difficult to expect the effect of electrical insulation, and when the insulating coating layer is formed thicker than the upper limit, the volume of the electrode tab becomes unnecessarily large, which is not preferable. [103] FIG. 2 schematically shows a pouch-type secondary battery according to an aspect of the present invention, and shows an embodiment in which an insulating coating layer (C) is formed on a positive electrode tab in the pouch-type secondary battery as shown in FIG. 1. [104] Since there is a high possibility that the positive electrode tab will preferentially contact the negative electrode (current collector or active material) of the electrode assembly in case of external impact due to dropping, the slurry for forming the insulating coating layer of the present invention is preferably coated on the positive electrode tab. An insulating coating layer may be formed on both of the negative electrode tabs. [105] In addition, although only one positive electrode tab is shown in FIG. 2, in a secondary battery including a plurality of positive and negative electrode tabs as a plurality of positive and negative electrodes are used, an insulating coating layer is formed on each of the plurality of positive and negative electrode tabs. I can. [106] In addition, in the present invention, the insulating coating layer may be formed on some or all of the electrode tabs. [107] As a non-limiting example of the case where the insulating coating layer is formed on a portion of the electrode tab, there may be mentioned an aspect in which the electrode tab is formed on an electrode tab portion adjacent to the electrode assembly, which is a portion having a high possibility of contact with the electrode assembly. Alternatively, there is an embodiment in which an insulating coating layer is formed on a portion of the electrode tab except for the connection portion with the electrode lead. [108] An insulating coating layer may be formed on all of the electrode tabs. Since the electrical insulating coating layer is melted and removed during welding for connection with the electrode lead, it is possible to form an insulating coating layer on the entire electrode tab, and in terms of process convenience, it is preferable to form an insulating coating layer on all of the electrode tabs. [109] In the present invention, the electrode assembly formed by sequentially stacking the anode and the cathode with a separator interposed therebetween is stacked in a stack type or stack-folding type to form a secondary battery or is wound in a jelly-roll form to constitute a secondary battery. I can. [110] The battery case may have various shapes, for example, a pouch type case or a prismatic case. [111] The positive electrode is prepared by, for example, applying a mixture of a positive electrode active material, a conductive material, and a binder on a positive electrode current collector, followed by drying, and if necessary, a filler may be further added to the mixture. [112] The positive electrode active material may be a layered compound such as lithium cobalt oxide (LiCoO 2 ) or lithium nickel oxide (LiNiO 2 ), or a compound substituted with one or more transition metals; Lithium manganese oxides such as formula Li 1+x Mn 2-x O 4 (wherein x 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 2 V 2 O Vanadium oxides such as 7 ; Ni site type lithium nickel oxide represented by the formula LiNi 1 - x M x O 2 (here, M = Co, Mn, Al, Cu, Fe, Mg, B or Ga, and x = 0.01 to 0.3); Formula LiMn 2 - x M x O 2 (where M = Co, Ni, Fe, Cr, Zn or Ta, and x = 0.01 to 0.1) or Li 2 Mn 3 MO 8 (where M = Fe, Co, A lithium manganese composite oxide represented by Ni, Cu or Zn); LiMn 2 O 4 wherein part of Li in the formula is substituted with alkaline earth metal ions ; Disulfide compounds; Fe 2 (MoO 4 ) 3 And the like, but are not limited thereto. [113] The positive electrode current collector is generally made to have a thickness of 3 to 500 μm. Such a positive electrode current collector is not particularly limited as long as it has high conductivity without causing chemical changes in the battery, for example, stainless steel, aluminum, nickel, titanium, calcined carbon, or the surface of aluminum or stainless steel. For example, those treated with carbon, nickel, titanium, silver, etc. may be used. The current collector may increase the adhesion of the positive electrode active material by forming fine irregularities on its surface, and various forms such as films, sheets, foils, nets, porous bodies, foams, and nonwoven fabrics are possible. [114] The conductive material is typically added in an amount of 1 to 50% by weight based on the total weight of the mixture including the positive electrode active material. Such a conductive material is not particularly limited as long as it has conductivity without causing a chemical change in the battery, and examples thereof include graphite such as natural graphite or artificial graphite; Carbon blacks such as carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, and thermal black; Conductive fibers such as carbon fibers and metal fibers; Metal powders such as carbon fluoride, aluminum, and nickel powder; Conductive whiskey such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives may be used. [115] The binder is a component that aids in bonding of an active material and a conductive material and bonding to a current collector, and is typically added in an amount of 1 to 50% by weight based on the total weight of the mixture including the positive electrode active material. Examples of such a binder include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene- Propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber, fluorine rubber, and various copolymers. [116] The filler is selectively used as a component that suppresses the expansion of the positive electrode, and is not particularly limited as long as it is a fibrous material without causing chemical changes to the battery, and examples thereof include olefin-based polymers such as polyethylene and polypropylene; Fibrous materials such as glass fiber and carbon fiber are used. [117] The negative electrode is manufactured by coating and drying a negative electrode material on a negative electrode current collector, and if necessary, the above-described components may be further included. [118] The negative electrode current collector is generally made to have a thickness of 3 to 500 μm. Such a negative electrode current collector is not particularly limited as long as it has conductivity without causing chemical changes to the battery, for example, copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel. For the surface treatment with carbon, nickel, titanium, silver, etc., aluminum-cadmium alloys, etc. may be used. In addition, like the positive electrode current collector, it is possible to enhance the bonding strength of the negative electrode active material by forming fine irregularities on the surface thereof, and may be used in various forms such as films, sheets, foils, nets, porous bodies, foams, and nonwoven fabrics. [119] The negative electrode material may be, for example, carbon such as non-graphitized carbon and graphite-based carbon; LixFe 2 O 3 ( 0≤x≤1 ), Li x WO 2 ( 0≤x≤1 ), Sn x Me 1 - x Me' y O z (Me: Mn, Fe, Pb, Ge; Me': Al , B, P, Si, elements of groups 1, 2, and 3 of the periodic table, halogen, metal complex oxides such as 0