Title of Invention: Electrode, method for manufacturing the same, and secondary battery including the same technology field [One] Mutual Citation with Related Applications [2] This application claims the benefit of priority based on Korean Patent Application No. 10-2020-0024422 dated February 27, 2020, and all contents disclosed in the literature of the Korean patent application are included as part of this specification. [3] technology field [4] The present invention relates to an electrode, a manufacturing method thereof, and a secondary battery including the same. background art [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, and as part of this, the most actively researched fields are power generation and electricity storage using electrochemical reactions. [6] A representative example of an electrochemical device using such electrochemical energy is a secondary battery. Secondary batteries generate electrical energy through electrochemical oxidation and reduction reactions, and are used for a wide variety of purposes. For example, secondary batteries may be used in hand-held devices such as mobile phones, laptop computers, digital cameras, video cameras, tablet computers, power tools, and the like; various electric drive power devices such as electric bicycles, electric motorcycles, electric vehicles, hybrid vehicles, electric boats, electric airplanes and the like; A power storage device used to store power generated through renewable energy or surplus generated power; The use area is gradually expanding to an uninterruptible power supply device for stably supplying power to various information communication devices including server computers and communication base stations. [7] In general, a secondary battery is composed of an anode, a cathode, an electrolyte, and a separator. At this time, electrodes such as the positive electrode and the negative electrode may be generally manufactured by applying an electrode slurry containing an electrode active material on a current collector, rolling, and drying. The secondary battery may be inserted into an exterior material and used in the form of a battery pack. [8] Meanwhile, in the secondary battery, when a sharp object made of metal is subjected to a large impact, the object may penetrate the electrode. In this case, a short circuit may be formed when the object made of metal and the current collector are electrically connected, or electrodes of different polarities are electrically connected by the object made of metal, and through this, a large short circuit current may be generated. It can flow into a short circuit and generate a lot of heat. The heat generated therefrom may cause rapid decomposition of the electrolyte, resulting in rapid heat generation together with a large amount of gas, which may cause the secondary battery to explode. [9] Therefore, various methods for improving safety for nail-penetration have been attempted in the field of secondary batteries, for example, a method of reducing the amount of current by increasing the resistance of an electrode, a method of forming a coating layer on an electrode, etc. this is being tried However, since these methods cause an increase in resistance or a decrease in the amount of current, there is a problem that is opposite to the development direction of secondary batteries requiring high output. [10] Therefore, in the field of secondary batteries requiring high power, there is a demand for the development of secondary batteries with improved nail penetration safety. [11] Korean Patent Publication No. 10-2014-0015841 discloses a lithium secondary battery including an electrode having a double coating layer to improve nail penetration safety, but there is a limit to solving the above problems. [12] [Prior art literature] [13] [Patent Literature] [14] Korean Patent Publication No. 10-2014-0015841 DETAILED DESCRIPTION OF THE INVENTION technical challenge [15] One object of the present invention is to provide an electrode with excellent nail penetration safety and reduced resistance and excellent output characteristics. [16] In addition, another object of the present invention is to provide a method for manufacturing the electrode described above. [17] In addition, another object of the present invention relates to a secondary battery including the electrode. means of solving the problem [18] The present invention relates to an electrode active material sheet comprising an electrode active material and a binder polymer; and a current collector including a mesh structure, wherein at least a portion of the mesh structure is inserted into the electrode active material sheet, and the binder polymer has a thermal decomposition temperature of 270°C to 315°C. [19] In addition, the present invention comprises the steps of preparing an electrode active material sheet comprising a current collector comprising a mesh structure, an electrode active material, and a binder polymer; and inserting at least a portion of the mesh structure into the electrode active material sheet by placing the electrode active material sheet on the current collector and pressurizing the electrode active material sheet. [20] In addition, the present invention provides a secondary battery including the electrode described above. Effects of the Invention [21] The electrode according to the present invention includes an electrode active material sheet and a current collector including a mesh structure at least partially inserted into the electrode active material sheet, and even if a metal object such as a nail penetrates the electrode, the mesh structure and the metal object do not come into contact with each other. Alternatively, since only a portion of the mesh structure is broken even when the metal object contacts the mesh structure, the contact area between the metal object and the current collector can be reduced to prevent electrical short circuit and improve nail penetration safety. [22] In addition, according to the electrode of the present invention, by including a binder polymer having a thermal decomposition temperature in a specific range in the electrode active material sheet, the heat resistance of the electrode active material sheet can be improved to a desirable level to improve nail penetration safety, while the electrode active material sheet Since resistance can be reduced, it is possible to implement an electrode and a secondary battery with improved nail penetration safety and output characteristics at the same time. [23] In addition, according to the method for manufacturing an electrode of the present invention, it can be performed by a process of positioning and pressing an electrode active material sheet on a current collector including a mesh structure, and manufacturing of the electrode with improved nail penetration safety and output characteristics It is possible. In addition, an electrode active material sheet prepared using a binder polymer having a thermal decomposition temperature within a specific range may have excellent adhesion to a current collector. Brief description of the drawing [24] 1 is a view for schematically explaining a manufacturing method of an electrode of the present invention. [25] Figure 2 is a schematic plan view of the electrode produced from the manufacturing method of the electrode of the present invention. Mode for Carrying Out the Invention [26] The terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor may appropriately define the concept of terms in order to best explain his/her invention. 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. [27] Terms used in this specification are only used to describe exemplary embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. [28] In this specification, terms such as "comprise", "comprise" or "have" are intended to indicate that there is an embodied feature, number, step, component, or combination thereof, but one or more other features or It should be understood that the presence or addition of numbers, steps, elements, or combinations thereof is not precluded. [29] In the present specification, the average particle diameter (D 50 ) may be defined as a particle diameter corresponding to 50% of the cumulative volume in the particle diameter distribution curve of the particles. The average particle diameter (D 50 ) may be measured using, for example, a laser diffraction method. The laser diffraction method is generally capable of measuring particle diameters of several millimeters in the submicron region, and can obtain results with high reproducibility and high resolution. [30] Hereinafter, the present invention will be specifically described. [31] [32] [33] The present invention relates to an electrode, specifically an electrode for a lithium secondary battery. [34] Specifically, the electrode according to the present invention includes an electrode active material sheet including an electrode active material and a binder polymer; and a current collector including a mesh structure, wherein at least a portion of the mesh structure is inserted into the electrode active material sheet, and the binder polymer has a thermal decomposition temperature of 270° C. to 315° C. [35] The electrode according to the present invention includes an electrode active material sheet and a current collector including a mesh structure at least partially inserted into the electrode active material sheet, and even if a metal object such as a nail penetrates the electrode, the mesh structure and the metal object do not come into contact with each other. Alternatively, since only a portion of the mesh structure is broken even when the metal object contacts the mesh structure, the contact area between the metal object and the current collector can be reduced to prevent electrical short circuit and improve nail penetration safety. [36] In addition, according to the electrode of the present invention, nail penetration safety can be improved by including a binder polymer having a thermal decomposition temperature in a specific range in the electrode active material sheet to improve the heat resistance of the electrode active material sheet to a desirable level, and at the same time, the electrode active material Since the resistance in the sheet can be reduced, it is possible to implement an electrode and a secondary battery with improved nail penetration safety and output characteristics at the same time. [37] [38] The electrode active material sheet includes an electrode active material and a binder polymer. [39] The electrode active material may be selected from a positive electrode active material and a negative electrode active material, and specifically may be a negative electrode active material. As the cathode active material and the anode active material, general cathode active materials and anode active materials used in the art may be used without limitation. [40] The negative electrode active material may be at least one selected from a carbon-based active material and a silicon-based active material, and specifically may be a carbon-based active material. [41] The carbon-based active material may include at least one selected from the group consisting of artificial graphite, natural graphite, hard carbon, soft carbon, carbon black, graphene, and fibrous carbon, and preferably composed of artificial graphite and natural graphite. It may contain at least one selected from the group. [42] The average particle diameter (D 50 ) of the carbon-based active material is 3 μm to 25 μm, preferably 3 μm to 25 μm, in terms of ensuring structural stability of the active material during charging and discharging, and facilitating accessibility of the binder polymer for binding the active material and the current collector. It may be 8 μm to 15 μm. [43] The silicon-based active material may include a compound represented by SiO x (0≤x<2). Since SiO 2 does not react with lithium ions and cannot store lithium, x is preferably within the above range. [44] The average particle diameter (D 50 ) of the silicon-based active material is 1 μm to 15 μm, preferably from the viewpoint of ensuring structural stability of the active material during charging and discharging, and facilitating accessibility of the binder polymer for binding the active material and the current collector. may be 2 μm to 10 μm. [45] The cathode active material is a compound capable of reversible intercalation and deintercalation of lithium, and specifically, may include a lithium composite metal oxide containing lithium and at least one metal such as cobalt, manganese, nickel, or aluminum. have. More specifically, the lithium composite metal oxide is lithium-manganese-based oxide (eg, LiMnO 2 , LiMn 2 O 4 , etc.), lithium-cobalt-based oxide (eg, LiCoO 2 , etc.), lithium-nickel-based oxide (eg, LiNiO 2 , etc.), lithium-nickel-manganese-based oxide (eg, LiNi 1-Y Mn Y O 2 (where 0 [74] In addition, the present invention provides a method for manufacturing an electrode, specifically a method for manufacturing the electrode described above. [75] Specifically, the method of manufacturing an electrode of the present invention includes preparing an electrode active material sheet including a current collector including a mesh structure, an electrode active material, and a binder polymer; and inserting at least a portion of the mesh structure into the electrode active material sheet by placing the electrode active material sheet on the current collector and pressurizing the electrode active material sheet. [76] According to the manufacturing method of the electrode of the present invention, it can be performed by a process of positioning and pressing an electrode active material sheet on a current collector including a mesh structure, and manufacturing of the electrode with improved nail penetration safety and output characteristics is possible. . In addition, an electrode active material sheet prepared using a binder polymer having a thermal decomposition temperature within a specific range may have excellent adhesion to a current collector. [77] [78] The manufacturing method of the electrode of the present invention will be described in detail with reference to the drawings below. In adding reference numerals to components of each drawing, the same components may have the same numerals as much as possible even if they are displayed on 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 may be omitted. [79] 1 is a view for schematically explaining a manufacturing method of an electrode of the present invention. 2 is a plan view of an electrode manufactured from the electrode manufacturing method of the present invention. [80] Referring to FIG. 1, the method of manufacturing an electrode of the present invention includes the steps of preparing electrode active material sheets 20a and 20b including a current collector 10 including a mesh structure 11, an electrode active material, and a binder polymer. includes [81] The mesh structure 11 includes a plurality of meshes. 1 and 2, the width of the hole 12 of the mesh in the mesh structure 11 is 0.010 mm 2 to 225 mm 2 , preferably 0.25 mm 2 to 9.0 mm 2 , and may be the above range. When an external object, such as a nail, penetrates, it is possible to reduce the possibility of electrical connection between the mesh structure and the external object and improve the adhesiveness with the electrode active material sheet, so that the nail penetration safety is improved and the electrode active material sheet is separated from the mesh structure. may reduce the likelihood of In this specification, “the hole 12 of the mesh” may be defined as a plane figure formed by the intersection of adjacent straight lines or curves within the mesh, and the plane figure may be a polygon such as a triangle or a quadrangle or a circle. have. [82] The current collector 10 including the mesh structure 11 may be as described for the electrode described above. [83] The electrode active material sheets 20a and 20b may be manufactured by a method including the following steps: [84] (a) preparing a granular composite by mixing an electrode active material and a binder polymer; [85] (b) sieving the granular complex; and [86] (c) preparing an electrode active material sheet by pressing the granular composite. [87] [88] According to the manufacturing method of the electrode active material sheet, a granular composite is prepared by mixing the electrode active material and the binder polymer (step (a)). When the electrode active material and the binder are mixed, a granular composite in which the electrode active material and the binder are combined may be formed due to the adhesive force of the binder. [89] The electrode active material and the binder polymer may be as described for the electrode described above. [90] A conductive material may be further mixed with the electrode active material and the binder polymer. A description of the conductive material may be the same as that of the electrode described above. [91] Mixing of the electrode active material and the binder polymer may be performed by dry mixing. When using the above dry mixing, it is not necessary to perform a drying process for these mixtures, which is preferable. [92] According to the manufacturing method of the electrode active material sheet, a step of sieving the granular composite is included (step (b)). According to the sieving process, the uniformity of the granular composite can be improved, so that the distribution of components in the electrode active material sheet can be uniform. [93] According to the manufacturing method of the electrode active material sheet, an electrode active material sheet is prepared by pressing the granular composite (step (c)). As pressure is applied to the granular composite, the granular composite may agglomerate to produce an electrode active material sheet in the form of a sheet. [94] A description of the other electrode active material sheets 20a and 20b may be the same as described for the electrodes described above. [95] [96] In addition, in the method of manufacturing an electrode of the present invention, the electrode active material sheets 20a and 20b are placed on the current collector 10 and pressed to form at least a portion of the mesh structure 11 into the electrode active material sheets 20a and 20b. ); inserting into; [97] As shown in FIGS. 1 and 2 , as the electrode active material sheets 20a and 20b are placed on the current collector 10 and then pressed, at least a portion of the electrode active material sheets 20a and 20b The mesh structure 11 is inserted. [98] The electrode active material sheets 20a and 20b may be disposed on one side or both sides of the current collector 10 . For example, as shown in FIG. 1 , the electrode active material sheets 20a and 20b may be disposed on both sides of the current collector 10 . [99] The pressing may be performed with a linear pressure, and for example, by performing a roll press (30a, 30b) on the electrode active material sheet disposed on the current collector, at least a portion of the mesh structure may be inserted into the electrode active material sheet. have. [100] [101] [102] In addition, the present invention provides a secondary battery, more specifically, a lithium secondary battery including the electrode described above. [103] Specifically, the secondary battery includes a negative electrode; an anode facing the cathode; a separator interposed between the cathode and the anode; And an electrolyte; may include. The negative electrode and/or the positive electrode, preferably the negative electrode, may be the electrode described above. [104] [105] The separator separates the negative electrode and the positive electrode and provides a passage for the movement of lithium ions. As long as it is used as a separator in a secondary battery, it can be used without particular limitation. it is desirable Specifically, a porous polymer film, for example, a porous polymer film made of polyolefin-based polymers such as ethylene homopolymer, propylene homopolymer, ethylene/butene copolymer, ethylene/hexene copolymer, and ethylene/methacrylate copolymer, or these A laminated structure of two or more layers of may be used. In addition, conventional porous non-woven fabrics, for example, non-woven fabrics made of high melting point glass fibers, polyethylene terephthalate fibers, and the like may be used. In addition, a coated separator containing a ceramic component or a polymer material may be used to secure heat resistance or mechanical strength, and may be selectively used in a single-layer or multi-layer structure. [106] Examples of the electrolyte include, but are not limited to, organic liquid electrolytes, inorganic liquid electrolytes, solid polymer electrolytes, gel polymer electrolytes, solid inorganic electrolytes, and molten inorganic electrolytes that can be used in the manufacture of lithium secondary batteries. [107] Specifically, the electrolyte may include a non-aqueous organic solvent and a metal salt. [108] As the non-aqueous organic solvent, for example, N-methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, gamma-butyllolactone, 1,2-dimethine Toxyethane, tetrahydrofuran, 2-methyltetrahydrofuran, dimethylsulfoxide, 1,3-dioxorane, formamide, dimethylformamide, dioxorane, acetonitrile, nitromethane, methyl formate, methyl acetate, phosphoric acid Triester, trimethoxy methane, dioxolane derivative, sulfolane, methyl sulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbonate derivative, tetrahydrofuran derivative, ether, methyl propionate, propionic acid An aprotic organic solvent such as ethyl may be used. [109] In particular, among the carbonate-based organic solvents, ethylene carbonate and propylene carbonate, which are cyclic carbonates, are high-viscosity organic solvents and have a high dielectric constant, so they can be preferably used because they dissociate lithium salts well. When the same low-viscosity, low-dielectric constant linear carbonate is mixed and used in an appropriate ratio, an electrolyte having high electrical conductivity can be made and can be used more preferably. [110] The metal salt may be a lithium salt, and the lithium salt is a material that is easily soluble in the non-aqueous electrolyte solution. For example, the anion of the lithium salt is 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 3SO 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. [111] In addition to the components of the electrolyte, the electrolyte may include, for example, haloalkylene carbonate-based compounds such as difluoroethylene carbonate, pyridine, and trialkylene carbonate for the purpose of improving battery life characteristics, suppressing battery capacity decrease, and improving battery discharge capacity. Ethyl phosphite, triethanolamine, cyclic ether, ethylene diamine, n-glyme, hexamethylphosphate triamide, nitrobenzene derivative, sulfur, quinone imine dye, N-substituted oxazolidinone, N,N-substituted imine One or more additives such as dazolidine, ethylene glycol dialkyl ether, ammonium salt, pyrrole, 2-methoxy ethanol or aluminum trichloride may be further included. [112] [113] According to another embodiment of the present invention, a battery module including the secondary battery as a unit cell and a battery pack including the same are provided. Since the battery module and the battery pack include the secondary battery having high capacity, high rate and cycle characteristics, a medium or large-sized device selected from the group consisting of an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage system can be used as a power source for [114] Hereinafter, preferred embodiments are presented to aid understanding of the present invention, but the above embodiments are merely illustrative of the present description, and various changes and modifications are possible within the scope and spirit of the present description. It is obvious to those skilled in the art, Naturally, such variations and modifications fall within the scope of the appended claims. [115] [116] Example [117] Example 1 [118] [119] As the binder polymer, a mixture of styrene-butadiene rubber as the first binder polymer and polytetrafluoroethylene (weight average molecular weight: 40,000 g/mol) as the second binder polymer in a weight ratio of 90:10 was used. The thermal decomposition temperature of the binder polymer measured by thermogravimetric analysis (TGA) was 297°C. [120] Artificial graphite (average particle diameter (D 50 ): 18㎛) as an anode active material, the binder polymer, and carbon black (product name: Super-C, manufacturer: Timcal) as a conductive material are dry-mixed at a weight ratio of 95:4:1 to form granules. type complex was prepared. The granular composite was added to distilled water to have a solid content of 85%, stirred for 2 hours using a planetary mixer, and sieved through a sieve having a mesh diameter of 5 mm. [121] The granular composite was placed in a sheet form and pressed by linear pressure using a roll press to prepare a sheet form of an electrode active material sheet. [122] [123] [124] A current collector comprising a copper mesh structure having a width × length × height of 36 mm × 56 mm × 0.05 mm, a mesh diameter of 1 mm, and a mesh hole width of 1 mm 2 (width 1 mm × length 1 mm) was prepared. [125] The electrode active material sheet prepared above was disposed on both sides of the current collector, and linear pressure was applied through a roll press to insert the mesh structure into the electrode active material sheet, which was used as the negative electrode of Example 1. In the negative electrode prepared above, the thickness of the electrode active material sheet was 200 μm. [126] [127] Example 2 [128] A negative electrode was prepared in the same manner as in Example 1, except that a mixture of the first binder polymer and the second binder polymer in a weight ratio of 95:5 was used as the binder polymer (pyrolysis temperature: 308 ° C). [129] [130] Example 3 [131] An anode was prepared in the same manner as in Example 1, except that a mixture of the first binder polymer and the second binder polymer in a weight ratio of 80:20 was used as the binder polymer (pyrolysis temperature: 284° C.). [132] [133] Comparative Example 1 [134] An anode was manufactured in the same manner as in Example 1, except that only the second binder polymer (pyrolysis temperature: 326° C.) used in Example 1 was used as the binder polymer. [135] [136] Comparative Example 2 [137] The same method as in Example 1 was performed, except that only the first binder polymer (pyrolysis temperature: 263° C.) used in Example 1 was used as the binder polymer. However, in the case of Comparative Example 2, the dispersibility of the binder polymer used was low, making it impossible to manufacture the negative electrode itself. [138] [139] Comparative Example 3 [140] The anode active material used in Example 1, a mixture of styrene-butadiene rubber and carboxymethyl cellulose at a weight ratio of 2:1 as a binder polymer, and carbon black (product name: Super-C, manufacturer: Timcal) as a conductive material at 95 A negative electrode slurry was prepared by adding distilled water at a weight ratio of 4:1. [141] The negative electrode slurry was applied to a sheet-shaped copper current collector (thickness: 20 μm), rolled, and dried in a vacuum oven at 130 ° C. for 10 hours to form a negative electrode active material layer (thickness: 210 μm), A negative electrode was prepared. [142] [143] [Table 1] [144] [145] Experimental Example [146] [147] LiNi 0.8 Co 0.1 Mn 0.1 O 2 as a cathode active material, carbon black as a conductive material, and PVdF as a binder were mixed in a weight ratio of 94:3.5:2.5 and added to N-methyl-2-pyrrolidone (NMP) to form a cathode slurry. was manufactured. The prepared positive electrode slurry was coated on an aluminum current collector, dried and rolled, and then cut into a predetermined size to prepare a positive electrode. [148] An electrode assembly was prepared by interposing a porous polyethylene separator between the positive electrode prepared as described above and the negative electrode of Example 1, the electrode assembly was placed inside the case, and then the electrolyte was injected into the case to prepare the secondary battery of Example 1. A battery was made. [149] The electrolyte was an organic solvent in which ethylene carbonate (EC) and diethyl carbonate (DEC) were mixed in a volume ratio of 30:70, and LiPF6 as a lithium salt was added at a concentration of 1M. [150] [151] The secondary batteries of Examples 2 to 3 and Comparative Examples 1 to 3 were prepared in the same manner as in Example 1, except that the negative electrodes of Examples 2 to 3 and Comparative Examples 1 to 3 were respectively used. [152] [153] Experimental Example [154] Experimental Example 1: Nail penetration safety test [155] After fully charging the secondary batteries prepared in Examples 1 to 3 and Comparative Examples 1 to 3 under conditions of 0.1 C and 4.2 V, a nail having a diameter of 10 mm was lowered at a speed of 25 mm/s to pass through the center of the battery, and passed through the battery. The penetration experiment was completed at the point where the length of the protruding nail was 10 mm. Five secondary batteries prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were prepared and the above penetration test was repeated 5 times. [156] In Table 2, 1) the number of ignitions of the secondary battery during the five experiments, and 2) the maximum temperature of the unignited secondary battery when there is an unignited secondary battery. [157] [158] [Table 2] [159] [160] Referring to Table 2, in the case of the secondary batteries of Examples, it can be seen that the nail penetration safety is excellent because the number of ignitions is low and the maximum temperature of the unignited secondary batteries is low compared to Comparative Examples. [161] [162] [Description of code] [163] 10: entire collector [164] 11: mesh structure [165] 12: mesh hole [166] 20a, 20b: electrode active material sheet [167] 30a, 30b: roll press claims [Claim 1] An electrode active material sheet containing an electrode active material and a binder polymer; and a current collector including a mesh structure, wherein at least a portion of the mesh structure is inserted into the electrode active material sheet, and the binder polymer has a thermal decomposition temperature of 270° C. to 315° C. [Claim 2] The method according to claim 1, wherein the binder polymer includes a first binder polymer and a second binder polymer, the first binder polymer is styrene-butadiene rubber, polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene Copolymer, polyacrylonitrile, polymethyl methacrylate, polyvinyl alcohol, carboxymethyl cellulose, starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, polyethylene, polypropylene, polyacrylic acid, ethylene-propylene- At least one selected from the group consisting of diene monomers and fluororubbers, wherein the second binder polymer is polytetrafluoroethylene. [Claim 3] The electrode according to claim 2, wherein the binder polymer includes the first binder polymer and the second binder polymer in a weight ratio of 60:40 to 99.9:0.1. [Claim 4] The electrode according to claim 1, wherein the binder polymer is included in an amount of 0.5% to 20% by weight in the electrode active material sheet. [Claim 5] The electrode according to claim 1, wherein the mesh structure includes at least one selected from the group consisting of copper, stainless steel, aluminum, nickel, titanium, calcined carbon, and an aluminum-cadmium alloy. [Claim 6] The electrode according to claim 1, wherein the electrode is a cathode. [Claim 7] The electrode according to claim 6, wherein the electrode active material is at least one selected from a carbon-based active material and a silicon-based active material. [Claim 8] The method according to claim 1, The width of the hole of the mesh in the mesh structure is 0.010mm 2 To 225mm 2 The electrode. [Claim 9] preparing an electrode active material sheet including a current collector including a mesh structure, an electrode active material, and a binder polymer; and inserting at least a portion of the mesh structure into the electrode active material sheet by placing the electrode active material sheet on the current collector and pressurizing the electrode active material sheet. [Claim 10] The method according to claim 9, wherein the electrode active material sheet is prepared by a method comprising the following steps: (a) preparing a granular composite by mixing an electrode active material and a binder polymer; (b) sieving the granular complex; and (c) preparing an electrode active material sheet by pressing the granular composite. [Claim 11] The method of manufacturing an electrode according to claim 10, wherein the pressing is performed with a linear pressure. [Claim 12] A secondary battery comprising the electrode according to claim 1.