Title of the invention: electrode, secondary battery including the electrode, and method of manufacturing the electrode Technical field [One] Mutual citation with related applications [2] This application claims the benefit of priority based on Korean Patent Application No. 10-2018-0040574 filed on April 6, 2018 and Korean Patent Application No. 10-2019-0040100 filed on April 5, 2019. All contents disclosed in the documents of the Korean patent application are included as part of this specification. [3] [4] Technical field [5] The present invention relates to an electrode, a secondary battery including the same, and a method of manufacturing the electrode, wherein the electrode includes an electrode active material layer, and the electrode active material layer includes an electrode active material; Polyvinylidene fluoride; And a conductive material, wherein the conductive material includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is 0.01% to 0.5% by weight in the electrode active material layer It can be included in %. Background [6] A typical example of an electrochemical device that uses electrochemical energy is a secondary battery, and its use area is gradually expanding. In recent years, 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 conducted on, and 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 positive electrode and a negative electrode are generally composed of an electrode current collector and an electrode active material layer formed on the electrode current collector, and the electrode active material layer is coated with an electrode slurry composition including an electrode active material, a conductive material, a binder, etc. on the electrode current collector. It is manufactured by rolling after drying. [8] On the other hand, conventionally, a point-type conductive material such as carbon black has been mainly used as a conductive material for a secondary battery, but there is a problem that the effect of improving electrical conductivity is not sufficient in the case of such a point-type conductive material. In order to improve these problems, studies on how to apply linear conductive materials such as carbon nanotubes (CNT) or carbon nanofibers (CNF) and planar conductive materials such as graphene are actively conducted. Has become. [9] However, in the case of a linear conductive material such as carbon nanotubes or carbon nanofibers, the electrical conductivity is excellent, but due to the nature of the material itself that grows in a bundle type or entangle type, its dispersibility in the slurry is poor, resulting in poor coating and fairness There is a problem that it is not evenly distributed in the active material layer. In order to improve such a problem, there have been attempts to improve dispersibility by introducing a functional group into a linear conductive material, but in this case, there is a problem in that the electrochemical properties are degraded due to the presence of the functional group. . [10] On the other hand, even in the case of a planar conductive material such as graphene, the electrical conductivity is excellent, but there is a problem that it is difficult to manufacture a single layer graphene having a thin thickness, and when using a thick graphene, the battery efficiency is reduced. There is a problem of deterioration. In addition, in the case of the planar conductive material, there is a problem that mobility of the electrolyte solution within the battery is limited due to the wide planar contact. [11] Therefore, there is a need for an electrode to which a conductive material that is excellent in electrical conductivity and can be uniformly distributed within the electrode is applied. Detailed description of the invention Technical challenge [12] One problem to be solved by the present invention is that the conductive material is uniformly dispersed throughout the electrode, so that the electrical conductivity of the electrode and the input characteristics and output characteristics of the battery can be improved, and the electrode adhesion is excellent, so that the life characteristics of the battery can be improved. It is to provide an electrode and a method of manufacturing the electrode. [13] Another problem to be solved by the present invention is to provide a secondary battery including the electrode. Means of solving the task [14] According to an embodiment of the present invention, an electrode active material layer is included, and the electrode active material layer includes an electrode active material; Polyvinylidene fluoride; And a conductive material, wherein the conductive material includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is 0.01% to 0.5% by weight in the electrode active material layer Included in %, an electrode is provided. [15] According to another embodiment of the present invention, preparing a mixture by adding a bundled single-walled carbon nanotube and polyvinylidene fluoride to a dispersion medium; Performing ultrasonic crushing on the mixture to prepare a conductive material dispersion comprising a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other; And forming an electrode slurry including the conductive material dispersion and an electrode active material, wherein the carbon nanotube structure is contained in an amount of 0.01% to 0.5% by weight in the solid content of the electrode slurry. Is provided. [16] According to another embodiment of the present invention, a secondary battery including the electrode is provided. Effects of the Invention [17] Since the electrode according to the present invention is manufactured through a conductive material dispersion in which bundle-type single-walled carbon nanotubes are properly dispersed with polyvinylidene fluoride, carbon nanotube structures in the form of ropes ( Long fibers) can be connected to each other to form a network structure. In particular, since a network structure can be formed to enable not only the conductive connection between the primary particles in the electrode active material, but also between the electrode active materials in the form of secondary particles (relatively long distance), the conductive path in the electrode The formation can be made effectively. Accordingly, even with a very small amount of conductive material, the electrical conductivity in the electrode can be greatly improved. In addition, the electrode active material layer is rigidly fixed by the carbon nanotube structures constituting the network structure, thereby improving electrode adhesion. [18] In addition, when the electrode slurry includes the carbon nanotube structure, the powder resistance of the electrode slurry decreases compared to the prior art, and thus the electrode resistance may be reduced. [19] When the electrode as described above is applied to a secondary battery, excellent effects can be obtained in terms of the electrochemical performance and life characteristics of the battery. Brief description of the drawing [20] 1 is a TEM photograph of Preparation Example 1 (a, b) and a TEM photograph of Preparation Example 4 (c, d). [21] 2 is an SEM photograph of the electrode of Example 1. [22] 3 is a SEM photograph of the electrode of Example 2. [23] 4 is a SEM photograph of the electrode of Example 3. [24] 5 is a SEM photograph of the electrode of Comparative Example 1. [25] 6 is a SEM photograph of the electrode of Comparative Example 2. [26] 7 is a SEM photograph of the electrode of Comparative Example 3. [27] 8 is a SEM photograph of the electrode of Comparative Example 4. Mode for carrying out the invention [28] The terms or words used in this 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. [29] The terms used in the present 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 indicates otherwise. [30] In the present specification, terms such as "comprise", "include" or "have" are intended to designate the presence of implemented features, numbers, steps, components, or a combination thereof, but one or more other features or It is to be understood that the possibility of the presence or addition of numbers, steps, components, or combinations thereof is not preliminarily excluded. [31] In this specification, "%" means% by weight unless otherwise indicated. [32] In the present specification, the "specific surface area" is measured by the BET method, and specifically, may be calculated from the amount of nitrogen gas adsorption under liquid nitrogen temperature (77 K) using BELSORP-mini II of BEL Japan. [33] [34] Hereinafter, the present invention will be described in detail. [35] [36] electrode [37] [38] The electrode according to the present invention includes an electrode active material layer, and the electrode active material layer includes an electrode active material; Polyvinylidene fluoride; And a conductive material, wherein the conductive material includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is 0.01% to 0.5% by weight in the electrode active material layer It can be included in %. [39] [40] The electrode may include an electrode active material layer. The electrode may further include a current collector, in which case the electrode active material layer may be disposed on one or both surfaces of the current collector. [41] The current collector is not particularly limited as long as it is a conductive material without causing chemical changes to the battery. For example, copper, stainless steel, aluminum, nickel, titanium, alloys thereof, carbon, nickel, titanium on the surface thereof , A surface-treated with silver or the like or calcined carbon may be used. [42] The current collector may generally have a thickness of 3 μm to 500 μm, and fine unevenness may be formed on the surface of the current collector to enhance the bonding strength of the negative electrode active material. In addition, the electrode current collector may be used in various forms, such as a film, a sheet, a foil, a net, a porous material, a foam, and a nonwoven fabric. [43] [44] The electrode active material layer may include an electrode active material; Polyvinylidene fluoride; And a conductive material. [45] [46] The electrode active material may be a positive electrode active material or negative electrode active materials generally used in the art, and the type is not particularly limited. [47] For example, as the positive electrode active material, lithium oxide including lithium and at least one metal such as cobalt, manganese, nickel or aluminum may be used. More specifically, the lithium oxide is a lithium-manganese-based oxide (eg, LiMnO 2 , LiMn 2 O, etc.), a lithium-cobalt-based oxide (eg, LiCoO 2, etc.), and a lithium-nickel-based oxide (eg For example, LiNiO 2 ), lithium-nickel-manganese oxide (e.g., LiNi 1-Y1 Mn Y1 O 2 (here, 0