[One][Citation with related applications] [2]This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0050870 filed on April 30, 2019, and all contents disclosed in the Korean Patent Application Document are incorporated as a part of this specification. [3] [4] [Technical field] [5] The present invention relates to a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same, and more particularly, by forming a stable SEI film on the electrode interface to minimize the film destruction reaction during the insertion and desorption of Li ions during charging/discharging By doing so, it relates to a non-aqueous electrolyte for a lithium secondary battery including an electrolyte additive capable of suppressing an increase in resistance when exposed to high temperatures, and a lithium secondary battery including the same. [6] background [7] Recently, interest in energy storage technology is increasing, and as the field of application is expanded to energy of mobile phones, camcorders, notebook PCs, and even electric vehicles, efforts for research and development of electrochemical devices are becoming more concrete. [8] Among electrochemical devices, interest in the development of rechargeable batteries capable of charging and discharging is rising, and in particular, lithium secondary batteries developed in the early 1990s are in the spotlight because of their high operating voltage and extremely high energy density. [9] Lithium secondary batteries generally form an electrode assembly by interposing a separator between a positive electrode including a positive electrode active material made of a transition metal oxide containing lithium and a negative electrode including a negative electrode active material capable of storing lithium ions, and the electrode It is manufactured by inserting the assembly into the battery case, injecting a non-aqueous electrolyte serving as a medium for transferring lithium ions, and then sealing the assembly. [10] The nonaqueous electrolyte is generally composed of a lithium salt and an organic solvent capable of dissolving the lithium salt, and LiPF 6 and the like are mainly used as the lithium salt. However, in the case of PF 6 − anion, it is very vulnerable to heat, so that when the battery is exposed to high temperatures, it is thermally decomposed to generate Lewis acids such as PF 5 . Lewis acids such as PF 5 not only cause decomposition of organic solvents such as ethyl carbonate, but also increase the resistance of the battery by destroying the SEI film formed by the reduction reaction on the surface of the active material having an operating voltage that exists outside the electrochemical stability window of the electrolyte. and deteriorate the lifespan characteristics. [11] Accordingly, there is a demand for the development of a lithium secondary battery capable of preventing an increase in battery resistance and deterioration of performance by preventing damage to the SEI film at a high temperature. [12] DETAILED DESCRIPTION OF THE INVENTION technical challenge [13] The present invention is to solve the above problems, strengthen the SEI film on the surface of the positive electrode and / or negative electrode, and comprising an additive having a functional group that can remove (scavenging) electrolyte by-products that cause the decomposition of the SEI film An object of the present invention is to provide a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same. [14] means of solving the problem [15] In one aspect, the present invention, an organic solvent; lithium salt; And it provides a non-aqueous electrolyte for a lithium secondary battery comprising a compound represented by the following formula (1). [16] [Formula 1] [17] [18] [19] In another aspect, the present invention provides a positive electrode; cathode; a separator interposed between the anode and the cathode; And it provides a lithium secondary battery comprising the non-aqueous electrolyte according to the present invention. [20] Effects of the Invention [21] The additive of Formula 1 included in the non-aqueous electrolyte of the present invention is a compound containing N, F and propargyl groups, and the N atom in the compound acts as a Lewis base to remove a Lewis acid generated as an electrolyte decomposition product, Allows me to inhibit further decomposition of my organic solvents. [22] On the other hand, the propargyl group included in the additive of Formula 1 is decomposed on the electrode surface to induce a polymerization reaction of the SEI film, thereby allowing the passivation film on the electrode surface to be densely formed, thereby increasing the stability of the SEI film. [23] In addition, the F atom included in the additive of Formula 1 is separated from the compound to form LiF, which is a component of the anode SEI film, so that the anode SEI film can be stably formed. [24] Therefore, when the nonaqueous electrolyte of the present invention including the additive of Formula 1 is used, damage to the SEI membrane and generation of gas due to the decomposition reaction of the electrolyte when exposed to high temperatures are suppressed, thereby effectively preventing deterioration of battery performance at high temperatures. [25] Brief description of the drawing [26] 1 is a view showing a measurement result of a high-temperature cycle characteristic according to Experimental Example 3. Referring to FIG. [27] Best mode for carrying out the invention [28] 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. [29] [30] As a result of repeated research to develop a lithium secondary battery having excellent performance even at high temperatures, the present inventors used a specific compound containing N, F and propargyl groups as a non-aqueous electrolyte additive to effectively prevent SEI membrane damage at high temperatures. It was found that it can be suppressed, and the present invention was completed. [31] [32] Hereinafter, the present invention will be described in more detail. [33] [34] non-aqueous electrolyte [35] The non-aqueous electrolyte according to the present invention includes a lithium salt, an organic solvent, and a compound represented by the following formula (1). [36] [Formula 1] [37] [38] [39] (1) lithium salt [40] As the lithium salt, various lithium salts commonly used in electrolytes for lithium secondary batteries may be used without limitation. For example, the lithium salt includes Li + as a cation, and F - , Cl - , Br - , I - , NO 3 - , N(CN) 2 - , BF 4 - , ClO 4 - as an anion. , AlO 4 - , AlCl 4 - , PF 6 - , SbF 6 - , AsF 6 - , B 10 Cl 10 -, BF 2 C 2 O 4 - , BC 4 O 8 - , PF 4 C 2 O 4 - , PF 2 C 4 O 8 - , (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 - , C 4 F 9 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 - , CH 3 SO 3 - , CF 3 (CF 2 ) 7 SO 3 - , CF 3 CO 2 - , CH 3 CO 2 - , SCN - and (CF 3 CF 2 SO 2 ) 2 N -It may include at least one selected from the group consisting of. [41] Specifically, the lithium salt is LiCl, LiBr, LiI, LiBF 4 , LiClO 4 , LiAlO 4 , LiAlCl 4 , LiPF 6 , LiSbF 6 , LiAsF 6 , LiB 10 Cl 10 , LiBOB (LiB(C 2 O 4 ) 2 ) , LiCF 3 SO 3 , LiTFSI (LiN(SO 2 CF 3 ) 2 ), LiFSI(LiN(SO 2 F) 2 ), LiCH 3 SO 3, LiCF 3 CO 2 , LiCH 3 CO 2 and LiBETI (LiN(SO 2 CF 2 CF 3 ) 2 at least one selected from the group consisting of 2 . Specifically, the lithium salt is LiBF 4 , LiClO 4 , LiPF 6 . , LiBOB (LiB(C 2 O 4 ) 2 ), LiCF 3 SO 3 , LiTFSI (LiN(SO 2 CF 3 ) 2 ), LiFSI (LiN(SO 2 F) 2 )) and LiBETI (LiN(SO 2 CF 2 CF 3 ) 2 A single substance selected from the group consisting of or a mixture of two or more thereof may be included. [42] The lithium salt can be appropriately changed within the range that can be used in general, but to be included in the electrolyte at a concentration of 0.8 M to 4.0 M, specifically, at a concentration of 1.0 M to 3.0 M, in order to obtain an optimal effect of forming a film for preventing corrosion of the electrode surface. can [43] If the concentration of the lithium salt is less than 0.8 M, the effect of improving the low-temperature output of the lithium secondary battery and improving the cycle characteristics during high-temperature storage is insignificant. can [44] [45] (2) organic solvents [46] As the organic solvent, various organic solvents commonly used in lithium electrolytes may be used without limitation. For example, the organic solvent may include a cyclic carbonate-based organic solvent, a linear carbonate-based organic solvent, or a mixed organic solvent thereof. [47] The cyclic carbonate-based organic solvent is a high-viscosity organic solvent, which has a high dielectric constant and can well dissociate lithium salts in the electrolyte, and specific examples thereof include ethylene carbonate (EC), propylene carbonate (PC), 1,2-butylene. At least one organic solvent selected from the group consisting of carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate and vinylene carbonate, among them, ethylene carbonate may include [48] In addition, the linear carbonate-based organic solvent is an organic solvent having a low viscosity and a low dielectric constant, and representative examples thereof include dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate, ethylmethyl carbonate ( EMC), at least one organic solvent selected from the group consisting of methyl propyl carbonate and ethyl propyl carbonate may be used, and specifically, ethyl methyl carbonate (EMC) may be included. [49] In addition, the organic solvent may further include a linear ester-based organic solvent and/or a cyclic ester-based organic solvent in the cyclic carbonate-based organic solvent and/or the linear carbonate-based organic solvent to prepare an electrolyte solution having high ionic conductivity. may [50] Specific examples of the linear ester-based organic solvent include at least one organic solvent selected from the group consisting of methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate and butyl propionate. can be heard [51] In addition, as the cyclic ester-based organic solvent, at least one organic solvent selected from the group consisting of γ-butyrolactone, γ-valerolactone, γ-caprolactone, σ-valerolactone, ε-caprolactone, can be heard [52] Meanwhile, as the organic solvent, an organic solvent commonly used in an electrolyte solution for a lithium secondary battery may be added without limitation, if necessary. For example, at least one organic solvent of an ether-based organic solvent, an amide-based organic solvent, and a nitrile-based organic solvent may be further included. [53] [54] (3) additives [55] The non-aqueous electrolyte for a lithium secondary battery of the present invention includes a compound represented by the following Chemical Formula 1 as an additive. [56] [Formula 1] [57] [58] [59] The compound represented by Formula 1 contains a nitrogen (N) atom, which is an electron donor that can serve as a Lewis base, so that Lewis acids such as PF 5 generated as a lithium salt decomposition product removal, it is possible to prevent further degradation of the organic solvent by Lewis acids. [60] In addition, the compound represented by Formula 1 includes an F atom, which is separated from the compound of Formula 1 and converted into LiF, which is a component forming the negative electrode SEI film, etc., so that a film can be stably formed on the surface of the negative electrode. makes it possible [61] In addition, the compound represented by Formula 1 includes a propargyl functional group, and the propargyl functional group induces a polymerization reaction of the negative electrode film so that the film can be densely formed. [62] [63] On the other hand, when the compound represented by Formula 1 is used together with an anode including a silicon (Si)-based anode active material, more excellent effects can be obtained. In the case of a negative electrode including a silicon-based negative active material, more O-rich components are included in the SEI film than a negative electrode using only a carbon-based negative active material. Since these O-rich film components tend to be more easily decomposed by the Lewis acid in the electrolyte, when a silicon-based anode active material is used, the instability of the anode SEI film at high temperatures increases, and thus, there is a problem in that high temperature durability is deteriorated. However, when the compound represented by Formula 1 is used as an electrolyte additive, as described above, the Lewis acid can be effectively removed and the anode film can be densely formed, so that the stability of the cathode film is improved at high temperature, Accordingly, it is possible to effectively prevent deterioration of battery performance due to decomposition of the anode film. [64] [65] The compound represented by Formula 1 is included in an amount of 0.1 to 3 parts by weight, preferably 0.5 to 2 parts by weight, based on 100 parts by weight of the nonaqueous electrolyte. This is because if the content of the compound represented by Formula 1 is too small, the effect is insignificant, and if too much, side effects such as resistance increase may occur. [66] [67] (4) additional additives [68] On the other hand, the non-aqueous electrolyte according to the present invention prevents negative electrode collapse due to decomposition of the non-aqueous electrolyte in a high-output environment, and further improves low-temperature high-rate discharge characteristics, high-temperature stability, overcharge prevention, and battery expansion inhibition effect at high temperatures. In order to do this, if necessary, other additional additives other than the compound represented by Formula 1 may be further included. [69] Examples of such additional additives include a cyclic carbonate-based compound, a halogen-substituted carbonate-based compound, a sultone-based compound, a sulfate-based compound, a phosphate-based compound, a borate-based compound, a nitrile-based compound, a benzene-based compound, an amine-based compound, and a silane-based compound and at least one selected from the group consisting of lithium salt-based compounds. [70] The cyclic carbonate-based compound may be, for example, vinylene carbonate (VC) or vinylethylene carbonate. [71] The halogen-substituted carbonate-based compound may be, for example, fluoroethylene carbonate (FEC). [72] The sultone-based compound is, for example, 1,3-propane sultone (PS), 1,4-butane sultone, ethensultone, 1,3-propene sultone (PRS), 1,4-butene sultone and 1- It may be at least one compound selected from the group consisting of methyl-1,3-propene sultone. [73] The sulfate-based compound may be, for example, ethylene sulfate (Esa), trimethylene sulfate (TMS), or methyl trimethylene sulfate (MTMS). [74] The phosphate-based compound is, for example, lithium difluoro(bisoxalato)phosphate, lithium difluorophosphate, tetramethyl trimethyl silyl phosphate, trimethyl silyl phosphite, tris(2,2,2-trifluoro It may be at least one compound selected from the group consisting of ethyl) phosphate and tris (trifluoroethyl) phosphite. [75] The borate-based compound may be, for example, tetraphenylborate, lithium oxalyldifluoroborate, or the like. [76] The nitrile-based compound is, for example, succinonitrile, adiponitrile, acetonitrile, propionitrile, butyronitrile, valeronitrile, caprylonitrile, heptanenitrile, cyclopentane carbonitrile, cyclohexane carbonitrile, From the group consisting of 2-fluorobenzonitrile, 4-fluorobenzonitrile, difluorobenzonitrile, trifluorobenzonitrile, phenylacetonitrile, 2-fluorophenylacetonitrile, and 4-fluorophenylacetonitrile It may be at least one or more selected compounds. [77] The benzene-based compound may be, for example, fluorobenzene, etc., the amine-based compound may be triethanolamine or ethylenediamine, and the silane-based compound may be tetravinylsilane. [78] The lithium salt-based compound is a compound different from the lithium salt included in the non-aqueous electrolyte, and is selected from the group consisting of LiPO 2 F 2 , LiODFB, LiBOB (lithium bisoxalatoborate (LiB(C 2 O 4 ) 2 ) and LiBF4). It may be more than one kind of compound. [79] Among these additional additives, when vinylene carbonate, vinylethylene carbonate, or succinonitrile is included, a more robust SEI film may be formed on the surface of the anode during the initial activation process of the secondary battery. [80] When the LiBF 4 is included, generation of a gas that may be generated due to the decomposition of the electrolyte during storage at a high temperature is suppressed, thereby improving the high temperature stability of the secondary battery. [81] [82] Meanwhile, two or more of the additional additives may be mixed and used, and may be included in an amount of 0.01 to 50% by weight, specifically 0.01 to 10% by weight, preferably 0.05 to 5% by weight, based on the total weight of the nonaqueous electrolyte. can be included as When the content of the additional additive is less than 0.01% by weight, the effect of improving the low-temperature output and high-temperature storage characteristics and high-temperature lifespan characteristics of the battery is insignificant, and when the content of the additional additive exceeds 50% by weight, the excess additive is There is a possibility that side reactions may occur excessively during charging and discharging of the battery. In particular, when the additives for forming the SEI film are added in excess, they may not be sufficiently decomposed at a high temperature, so that unreacted substances may be generated or deposited in the electrolyte at room temperature. Accordingly, a side reaction in which the lifespan or resistance characteristic of the secondary battery is deteriorated may occur. [83] [84] lithium secondary battery [85] Next, a lithium secondary battery according to the present invention will be described. [86] The lithium secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte is the non-aqueous electrolyte according to the present invention. Since the non-aqueous electrolyte has been described above, a description thereof will be omitted, and other components will be described below. [87] [88] (1) Anode [89] The positive electrode according to the present invention may include a positive electrode active material layer including a positive electrode active material, and if necessary, the positive electrode active material layer may further include a conductive material and/or a binder. [90] [91] The positive active material is a compound capable of reversible intercalation and deintercalation of lithium, and specifically, may be a lithium composite metal oxide including lithium and one or more transition metals such as cobalt, manganese, nickel or aluminum. . More specifically, the lithium composite metal oxide is a lithium-manganese oxide (eg, LiMnO 2 , LiMn 2 O 4 , etc.), a lithium-cobalt-based oxide (eg, LiCoO 2 , etc.), lithium-nickel-based oxide (eg, LiNiO 2 ), lithium-nickel-manganese oxide (eg, LiNi 1-a Mn a O 2 (0