Battery

Abstract

The present invention relates to the technical field of lithium batteries and provides a battery. The battery comprises a positive electrode plate, a separator, and a negative electrode plate, which are laminated. The separator comprises a first region in which the separator projects beyond the positive electrode plate in the lateral direction of the separator. The separator comprises a base film which is provided with an adhesive layer at least on one side facing the positive electrode plate. In the lateral direction of the separator, the separator further comprises a second region between the positive and negative electrode plates. The height of the projections of the adhesive layer in the first region and the second region, respectively, is designated X and Y. The battery further comprises an electrolyte solution comprising a first solvent and a first additive, each having a dielectric constant of ≤ 10.With respect to the total mass of the electrolyte solution, the mass fraction of the first solvent and the first additive is denoted as a and b, respectively. Here, 3 ≤ (a+b) / (X / Y) ≤ 60, so that the adhesion of the separator to the electrode plates is significantly increased and, at the same time, the problem of wetting caused by the adhesive layer of the separator blocking the pores is effectively solved.

Description

Technical field

[0001] The present invention relates to the technical field of lithium batteries and in particular to a battery. State of the art

[0002] In a lithium-ion battery, the adhesion between the electrode plates and the separator plays a crucial role in its performance, safety, and cycle life. To improve this adhesion, a glue-coated separator is typically used in the prior art. While the glue-coated separator can improve adhesion, after hot pressing the battery, the adhesive layer can block the separator's pores, leading to poor wetting by the electrolyte solution. This causes problems such as an increased DCR (dielectric constant rate) of the battery and lithium deposition due to reduced separator porosity. Disclosure of the invention

[0003] The object of the present invention is to overcome the aforementioned problems in the prior art and to provide a battery in which a first solvent and a first additive, each having a dielectric constant ≤ 10, are added to the electrolyte solution of the battery, and the mass fraction of the first solvent in the electrolyte solution, the mass fraction of the first additive in the electrolyte solution, the height of the protrusions of the adhesive layer in a first area, and the height of the protrusions of the adhesive layer in a second area satisfy a certain condition, so that the adhesion between the separator and the electrode plates is significantly increased and at the same time the problem of wetting due to the blocking of the pores by the adhesive layer of the separator is effectively solved.

[0004] To solve the above problem, the present invention provides a battery comprising a positive electrode plate, a separator and a negative electrode plate, which are laminated, wherein the separator comprises a first region in which the separator projects beyond the positive electrode plate in the width direction of the separator, wherein the separator comprises a base film which is provided with an adhesive layer at least on one side facing the positive electrode plate, wherein in the width direction of the separator the separator further comprises a second region between the positive and negative electrode plates, wherein the height of the protrusions of the adhesive layer in the first region is referred to as X µm and the height of the protrusions of the adhesive layer in the second region is referred to as Y µm, wherein the battery further comprises an electrolyte solution comprising a first solvent having a dielectric constant of ≤ 10 and a first additive having a dielectric constant of ≤ 10, wherein, with respect to the total mass of the electrolyte solution, the mass fraction of the first solvent is referred to as a and the mass fraction of the first additive as b, where for X, Y, a and b: 3 ≤ (a+b) / (X / Y) ≤ 60.

[0005] The technical solutions used herein have the following beneficial effects:

[0006] In the battery according to the invention, by adding the first solvent with a dielectric constant ≤ 10 and the first additive with a dielectric constant ≤ 10 and by adjusting the mass fraction (a) of the first solvent in the electrolyte solution, the mass fraction (b) of the first additive in the electrolyte solution, the height (X) of the protrusions of the adhesive layer in the first area, and the height (Y) of the protrusions of the adhesive layer in the second area to meet the condition 3 ≤ (a+b) / (X / Y) ≤ 60, a significant increase in the adhesion between the separator and the electrode plates is achieved, and at the same time the problem with wetting with the electrolyte solution due to the blocking of the pores by the adhesive layer of the separator is effectively solved.

[0007] The endpoints of a range or values ​​disclosed herein are not to be limited to the exact range or values, but are to be understood as including the values ​​that are in close proximity to the range or values. With respect to ranges of values, combining endpoints of different ranges, an endpoint of a range with a standalone value point, and standalone value points may yield one or more new ranges of values, which shall be considered to be specifically disclosed herein. Unless otherwise specified, the ranges of values ​​include the endpoints. Brief description of the characters Fig. Figure 1 shows a schematic view of the positional relationship between a separator and electrode plates. The area marked A is in Fig.1 for the second area of ​​the separator and the area marked by B for the first area of ​​the separator. Fig. Figure 2 shows a schematic view of a partial adhesive layer of the separator. The area marked by X is in Fig. 2 the height of the adhesive layer protrusions in the first area and the area marked by Y for the height of the adhesive layer protrusions in the second area. Fig. Figure 3 shows a schematic structural view of a positive electrode plate. The area marked by D is in Fig. 3 for the thickness of the ceramic coating.

[0008] Reference symbol list: 1- positive electrode plate; 2- separator; 3- negative electrode plate; 4- adhesive layer in the second area; 5- adhesive layer in the first area; 6- tab of the positive electrode plate; 7- ceramic coating. Detailed descriptions

[0009] The specific embodiments of the present invention are described in more detail below. It should be understood that the detailed embodiments described here serve only to describe and explain the present invention, without limiting it.

[0010] Unless otherwise specified, all technical and scientific terms used in the invention shall have the same meaning as is customary for a person skilled in the art in the field to which the invention belongs.

[0011] In the present invention, the terms “battery”, “lithium battery”, “lithium ion battery”, and “lithium ion secondary battery” have the same meaning, referring to a lithium ion secondary battery which typically comprises electrode components (such as a positive electrode plate, a negative electrode plate and a separator), a container to hold these (a housing) and an electrolyte solution.

[0012] In the present invention, the term "dielectric constant" refers to the ratio of a reduced electric field strength in a medium in which induced charges are generated under an applied electric field, thereby weakening the electric field, to the originally applied electric field strength (in a vacuum). The dielectric constant is an inherent property of a chemical compound and can be determined by consulting a textbook or document; for example, the dielectric constant of an organic solvent can be found in Gaussian's textbook or Lange's Handbook of Chemistry. As one embodiment, a measurement method for the dielectric constant is carried out with reference to standard GB / T 31838.8-2024.In one embodiment, the measurement for the dielectric constant comprises the following steps: (1) providing a parallel-plate capacitor, with a specific distance set between the two parallel plates; (2) completely filling the parallel-plate capacitor with an organic solvent to be measured; (3) switching on a power supply and changing the electric field strength by adjusting the voltage; and (4) measuring and recording the capacitance values ​​at different voltages, which represent the dielectric constant.

[0013] In the present invention, a battery is provided comprising a positive electrode plate, a separator and a negative electrode plate, which are laminated, wherein the separator comprises a first region in which the separator projects beyond the positive electrode plate in the width direction of the separator,

[0014] wherein the separator comprises a base film which is provided with an adhesive layer at least on one side facing the positive electrode plate, wherein in the width direction of the separator the separator further comprises a second region between the positive and negative electrode plates, wherein the height of the protrusions of the adhesive layer in the first region is referred to as X µm and the height of the protrusions of the adhesive layer in the second region is referred to as Y µm, wherein the battery further comprises an electrolyte solution comprising a first solvent having a dielectric constant of ≤ 10 and a first additive having a dielectric constant of ≤ 10, wherein, with respect to the total mass of the electrolyte solution, the mass fraction of the first solvent is referred to as a and the mass fraction of the first additive as b, where for X, Y, a and b: 3 ≤ (a+b) / (X / Y) ≤ 60.

[0015] For example, the value of (a+b) / (X / Y) can be 3, 4, 5, 6, 8, 10, 15, 20, 25, 30, 35, 40, 45, 50, 52, 54, 56, 57, 58, 59, 60 or any point value in a range between two point values ​​mentioned above.

[0016] For example, the values ​​of a, b, X, and Y can be set within the usual ranges of values ​​of a, b, X, and Y, and they remain within the scope of protection of the invention as long as a, b, X, and Y satisfy the condition 3 ≤ (a+b) / (X / Y) ≤ 60.

[0017] After hot pressing the adhesive-coated separator, the pores of the base film become blocked, leading to a reduction in the overall porosity of the separator and thus a significant reduction in wettability. To address this problem of reduced wettability after hot pressing, the invention proposes adding a first solvent with a dielectric constant ≤ 10, whose viscosity decreases with decreasing dielectric constant, to the electrolyte solution. This solvent reduces the viscosity of the electrolyte solution. Due to the principle of "like dissolves like," the first solvent can wet the adhesive layer of the separator more quickly, improving the overall wettability of the cell and promoting a reduction in DC resistance (DCR).The first solvent added to the electrolyte solution, with a dielectric constant ≤ 10, can act synergistically as a wetting agent to further increase wettability. Furthermore, if the mass fraction (a) of the first solvent in the electrolyte solution, the mass fraction (b) of the first additive in the electrolyte solution, the height (X) of the adhesive layer protrusions in the first region, and the height (Y) of the adhesive layer protrusions in the second region satisfy the condition 3 ≤ (a+b) / (X / Y) ≤ 60, the interaction of the electrolyte solution and the separator will significantly increase the adhesion between the separator and the electrode plates, while simultaneously effectively solving the wetting problem caused by pore blockage.This effectively prevents a large area of ​​blocked separator pores, insufficient electrolyte solution wettability, and a high DCR of the battery when the value of (a+b) / (X / Y) is less than 3, and avoids exacerbating the problem of battery performance at high temperatures when the value of (a+b) / (X / Y) is greater than 60.

[0018] It should be noted that a and b are introduced as their percentage values, and X and Y as the values ​​corresponding to the heights of the actual protrusions of the adhesive layer, when calculating the value of (a+b) / (X / Y). For example, if a = 60%, b = 1%, X = 5 µm, and Y = 2 µm, then (a+b) / (X / Y) = (60+1) / (5 / 2) = 24.4.

[0019] In some embodiments, as in Fig.Figure 1 shows the area marked by A for the second region of the separator and the area marked by B for the first region of the separator. The first region can therefore be understood as the region of the separator that protrudes beyond the positive electrode plate.

[0020] In some embodiments, as in Fig. 2 shows the thickness range marked by X the height of the protrusions of the adhesive layer 5 in the first area and the thickness range marked by Y for the height of the protrusions of the adhesive layer 4 in the second area.

[0021] In some embodiments, X, Y, a, and b satisfy the condition 7.5 ≤ (a+b) / (X / Y) ≤ 37.5. For example, the value of (a+b) / (X / Y) can be 7.5, 8, 9, 10, 15, 20, 25, 30, 32, 34, 36, 37.5, or any point value in the range between any two of the above-mentioned point values. If the condition 7.5 ≤ (a+b) / (X / Y) ≤ 37.5 is satisfied, the cell's wettability can be further improved, the lithium-ion migration rate increased, the DCR reduced, and thus the battery's high-temperature performance enhanced.

[0022] In some embodiments, the height X (in µm) of the adhesive layer protrusions in the first region satisfies the condition: 0.5 ≤ X ≤ 10. The height X of the adhesive layer protrusions in the first region can, for example, be 0.5 µm, 1 µm, 2 µm, 3 µm, 4 µm, 5 µm, 6 µm, 7 µm, 8 µm, 9 µm, 10 µm, or any point value in a range between two of the above-mentioned point values. The height Y (in µm) of the adhesive layer protrusions in the second region satisfies the condition: 0.2 ≤ Y ≤ 5. The height Y of the adhesive layer protrusions in the second region can be, for example, 0.2 µm, 0.5 µm, 1 µm, 2 µm, 3 µm, 4 µm, 5 µm, or any local value between two of the aforementioned local values. For X / Y: 1.5 ≤ X / Y ≤ 10. The value of X / Y can be, for example, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, or any local value between two of the aforementioned local values. Preferably, 2 ≤ X / Y ≤ 6.Since the size of the negative electrode plate is approximately larger than the designed size of the positive electrode plate, a lower stress is exerted on the first region of the separator after hot pressing compared to the central region. During the same hot pressing process, the height X of the adhesive layer protrusions in the first region of the separator is greater than the height Y of the adhesive layer protrusions in the second region, and the X / Y ratio gradually increases with pressure due to the difference in the applied stresses. Therefore, the magnitude of the X / Y ratio can indicate the degree of diffusion on the base film; a high X / Y ratio indicates low contact pressure on the adhesive layer, meaning the adhesive layer does not diffuse extensively onto the base film.Low X and Y values ​​mean that the adhesive layer has already largely diffused onto the base film, which can easily lead to blocking the separator pores and reducing wettability. If 3 ≤ (a+b) / (X / Y) ≤ 60, further adjusting the X / Y value to meet the aforementioned condition effectively avoids the problems of poor adhesion between the separator and the electrode plates when X / Y < 1.5 and a large area of ​​blocked pores and poor wettability when X / Y > 10. This further enhances battery performance by ensuring high adhesion and wettability.

[0023] In some embodiments, with respect to the total mass of the electrolyte solution, the sum a+b (in %) of the mass fraction of the first solvent and the mass fraction of the first additive satisfies the condition: 30 ≤ a+b ≤ 85. a+b can be, for example, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85% or any point value in a range between two of the above-mentioned point values. Preferably, 45 ≤ a+b ≤ 75. If 3 ≤ (a+b) / (X / Y) ≤ 60, further adjusting a+b to meet the aforementioned condition can effectively avoid the problems of high viscosity and poor wettability of the electrolyte solution when a+b < 30 and deterioration of high-temperature performance when a+b > 85, further reducing the DCR of the battery, and increasing the wettability of the electrolyte solution and the high-temperature performance of the battery.

[0024] In some embodiments, the mass fraction a (in %) of the first solvent with a dielectric constant of ≤ 10 satisfies the following condition with respect to the total mass of the electrolyte solution: 10 ≤ a ≤ 80. a can be, for example, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, or any specific value in a range between two of the aforementioned specific values. Preferably, 30 ≤ a ≤ 70. Since the mass fraction of the first solvent is too small with a < 10, the wettability cannot be effectively increased and the DCR of the battery cannot be reduced. Conversely, the mass fraction of the first solvent is too large with a > 80, so that it is easily decomposed at high temperatures and produces a gas, which leads to a deterioration of the battery's performance at high temperatures.If 3 ≤ (a+b) / (X / Y) ≤ 60 applies, then by further adjusting the mass fraction a (in %) of the first solvent with a dielectric constant ≤ 10 to meet the condition mentioned above, an effective increase in wettability and a reduction in the DCR of the battery can be achieved, taking into account the battery's performance at high temperatures.

[0025] In some embodiments, the mass fraction b (in %) of the first additive with a dielectric constant of ≤ 10 satisfies the condition: 0.5 ≤ b ≤ 10 with respect to the total mass of the electrolyte solution. The mass fraction of the first additive can be, for example, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or any specific value in a range between two of the aforementioned specific values. Preferably, 1 ≤ b ≤ 5. If 3 ≤ (a+b) / (X / Y) ≤ 60, the first additive can interact better with the first solvent by further adjusting the mass fraction b (in %) to meet the condition mentioned above, in order to further improve wettability, reduce the DCR of the battery and increase the efficiency of lithium-ion transfer.This way, problems such as unsatisfactory improvement in wetting, a high DCR of the battery, and negligible interaction with the first solvent can be avoided if the concentration of the first additive is too low (b < 0.5). Furthermore, problems such as slight defluorination to hydrogen fluoride and a deterioration of battery performance at high temperatures can also be avoided if the concentration of the first additive is too high (b > 10).

[0026] After hot pressing the adhesive-coated separator, the reduced porosity of the separator narrows the channels for lithium ions, increases the resistance to lithium ion transfer, and reduces the amount of lithium delivered to the negative electrode. If insufficient lithium ions are delivered to the negative electrode, they would deposit on its surface, forming elemental lithium metal and impairing the battery's performance.To further solve the problem of lithium deposition from the battery after hot pressing of the adhesive-coated separator, the invention further provides that the electrolyte solution comprises lithium bis(fluorosulfonyl)imide (LiFSI), wherein the mass percentage of lithium bis(fluorosulfonyl)imide relative to the total mass of the electrolyte solution is designated as c, and that the electrolyte solution further comprises lithium hexafluorophosphate (LiPF6), wherein the mass percentage of lithium hexafluorophosphate relative to the total mass of the electrolyte solution is designated as d, where c and d are such that: 1.0 ≤ c / 15+d / 12.5 ≤ 1.6. The value of c / 15+d / 12.5 can be, for example, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, or any specific value in a range between two of the aforementioned specific values.

[0027] In the invention, investigations reveal that a low concentration of lithium salt, low electrical conductivity, and low migration rate of lithium ions mean that the problem of lithium deposition cannot be effectively solved when c / 12.5+d / 15.0 < 1.0, and that an increased viscosity of the electrolyte solution is caused, which is unfavorable for wetting and also hinders the migration of lithium ions when c / 15+d / 12.5 > 1.6.The addition of lithium bis(fluorosulfonyl)imide and lithium hexafluorophosphate to the electrolyte solution when conditions 3 ≤ (a+b) / (X / Y) ≤ 60 and 1.0 ≤ c / 15+d / 12.5 ≤ 1.6 can lead to a further reduction in the viscosity of the electrolyte solution, an increase in electrical conductivity, an improvement in the dynamic properties of the entire system, and an effective solution to the problem of lithium deposition after hot pressing of the adhesive-coated separator, with increased wettability and a reduced DCR of the battery.

[0028] In some embodiments, the mass percentage c of lithium bis(fluorosulfonyl)imide and the mass percentage d of lithium hexafluorophosphate satisfy the condition: 0.1 ≤ c / d ≤ 3. The value of c / d can be, for example, 0.1, 0.5, 1, 1.5, 2, 2.5, 3, or any point value in a range between two of the above-mentioned point values.If the conditions 3 ≤ (a+b) / (X / Y) ≤ 60 and 1.0 ≤ c / 15+d / 12.5 ≤ 1.6 are met, adjusting the c / d ratio to meet the aforementioned condition can further avoid the problems that, at c / d < 0.1, the presence of too little LiFSI and too much LiPF6 leads to a non-significant reduction in the viscosity of the electrolyte solution and a less effective improvement in dynamics, and that, at c / d > 3, due to the presence of too much LiFSI and too little LiPF6, the current collector can be inefficiently passivated by LiPF6, could be corroded by LiFSI, and the performance at high temperatures can be degraded.

[0029] In some embodiments, the mass percentage c (in %) of lithium bis(fluorosulfonyl)imide, relative to the total mass of the electrolyte solution, satisfies the condition: 1 ≤ c ≤ 20. The mass percentage c of lithium bis(fluorosulfonyl)imide can be, for example, 1%, 3%, 5%, 7%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, or any specific value within a range between two of the aforementioned specific values. Preferably, 3 ≤ c ≤ 10. If c ≤ 1 ≤ c ≤ 20, the viscosity of the electrolyte solution can be further reduced, the electrical conductivity increased, the dynamic properties of the entire system improved, and the problem of lithium deposition solved.

[0030] In some embodiments, the mass percentage d (in %) of lithium hexafluorophosphate, relative to the total mass of the electrolyte solution, satisfies the condition: 1 ≤ d ≤ 20. The mass percentage d of lithium hexafluorophosphate can be, for example, 1%, 3%, 5%, 7%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, or any specific value within a range between two of the aforementioned specific values. Preferably, 5 ≤ d ≤ 15. If 1 ≤ d ≤ 20 applies to d, the viscosity of the electrolyte solution can be further reduced, the electrical conductivity increased, the dynamic properties of the entire system improved, and the problem of lithium deposition solved.

[0031] To further decompose the lithium salt, provide more migratory lithium ions, and improve the dynamics, the present invention further provides that the electrolyte solution also comprises a second solvent with a dielectric constant of ≥ 10, wherein, with respect to the total mass of the electrolyte solution, the mass fraction of the second solvent is referred to as m, where m and a are: 0.25 ≤ m / a < 1.0. The value of m / a can be, for example, 0.25, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.99, or any point value in a range between two of the above-mentioned point values.If m and a satisfy 0.25 ≤ m / a < 1.0, the problems that the cell's performance at high temperature deteriorates when m / a < 0.25, and that the high viscosity of the electrolyte solution impairs the cell's wetting when m / a > 1.0, can be avoided, and the high-temperature performance and dynamic properties can be further increased.

[0032] In some embodiments, the mass fraction m (in %) of the second solvent, relative to the total mass of the electrolyte solution, satisfies the condition: 5 ≤ m ≤ 40. The mass fraction of the second additive can be, for example, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, or any specific value within a range between two of the aforementioned specific values. Preferably, 20 ≤ m ≤ 30. If m is satisfied by 5 ≤ m ≤ 40, the dynamic properties of the electrolyte solution can be further improved.

[0033] In some embodiments, the second solvent comprises a cyclic carbonate compound with a dielectric constant of ≥ 10. For example, the cyclic carbonate compound could be one or more compounds of ethylene carbonate (EC, with a dielectric constant of 89.6), fluoroethylene carbonate (FEC, with a dielectric constant of 102), propylene carbonate (PC, with a dielectric constant of 66.1), and butyl carbonate (BC, with a dielectric constant of 55.9). The selection of the aforementioned cyclic carbonate compound can further improve the wettability of the electrolyte solution and optimize the battery's high-temperature performance.

[0034] To further increase the adhesion between the electrode plates and the separator, the invention further provides that an adhesive layer is applied to the surface of one side of the base film facing the negative electrode plate and an inorganic coating is applied to the surface of one side of the base film facing the positive electrode plate, with an adhesive layer being provided on the surface of one side of the inorganic coating facing away from the base film. If condition 3 ≤ (a+b) / (X / Y) ≤ 60 is met, the adhesion between the electrode plates and the separator can be further increased by the arrangement described above, while ensuring high wettability and a low DCR.

[0035] In some embodiments, the adhesive layer comprises several spaced-apart areas with adhesive dots. The areas with adhesive dots have an average diameter of 50 µm to 1000 µm. The average diameter of the areas with adhesive dots can be, for example, 50 µm, 100 µm, 200 µm, 300 µm, 400 µm, 500 µm, 600 µm, 700 µm, 800 µm, 900 µm, 1000 µm, or any point diameter within a range between any two of the above-mentioned point diameters.If the average diameter of the areas with adhesive dots remains within the range mentioned above, not only can pore blockage and reduced wettability due to excessive diffusion after hot pressing be effectively avoided, but the problem of unstable adhesion between the electrode plates and the separator, caused by insufficient diffusion due to an insufficient average diameter of the adhesive dot areas, can also be solved. This results in increased wettability of the electrolyte solution, a reduction in the battery's DCR (diffusion resistance coefficient), and improved battery performance, further enhancing the adhesion between the electrode plates and the separator.

[0036] According to the invention, "several spaced-apart areas with adhesive dots" can be understood to mean several identical or different areas with adhesive dots that are uniformly distributed on a substrate surface, either at equal or different intervals. The areas with adhesive dots can be identical or different with respect to their surface area, shape, or material. Furthermore, the areas with adhesive dots can be arranged either regularly or irregularly across the entire surface of the adhesive layer.

[0037] According to the invention, the specific shape of the areas with adhesive dots is not limited. By way of example, the specific shape of the areas with adhesive dots can assume a regular or irregular shape, such as a circle, triangle, rectangle, parallelogram, regular polygon and the like, which are included in the scope of protection of the invention.

[0038] If the area with adhesive dots is not circular, the diameter of the maximum circumcircle is referred to as the average diameter of the area with adhesive dots according to the invention.

[0039] For example, the areas with adhesive dots can be formed by conventional spraying or another conventional means.

[0040] In some embodiments, the area fraction of the adhesive layer on the inorganic coating or base film is 10%–60%. This area fraction can be, for example, 10%, 20%, 30%, 40%, 50%, 60%, or any specific value within a range between two of the aforementioned specific values. High adhesion between the electrode plates and the separator, while increasing the wettability of the electrolyte solution and reducing the DCR of the battery, is ensured when 3 ≤ (a+b) / (X / Y) ≤ 60 and, furthermore, the area fraction of the adhesive layer on the inorganic coating or base film is within the range mentioned above.

[0041] In some embodiments, the adhesive layer comprises organic particles consisting of one or more compounds of polyvinylidene fluoride, vinylidene difluoride-hexafluoropropylene copolymers, polyacrylic resin, polymethyl acrylate, butyl acrylate-acrylonitrile copolymers, polyacrylonitrile, ethylene-propylene copolymers, and polyethylene acrylate. In some embodiments, the organic particles have a DV50 of 300 µm–500 µm and / or a DV90 of 100 µm–800 µm. The DV50 of the organic particles can be, for example, 300 µm, 350 µm, 400 µm, 450 µm, 500 µm, or any local value within a range between any two local values ​​mentioned above. The DV90 of the organic particles can be, for example, 100 µm, 200 µm, 300 µm, 400 µm, 500 µm, 600 µm, 700 µm, 800 µm, 900 µm or any point value in a range between two of the above-mentioned point values.If the DV50 and / or DV90 of the organic particles remain within the range mentioned above, the problems of excessively large organic particle sizes causing pore blockage and excessively small particle sizes resulting in unstable adhesion between the electrode plates and the separator can be avoided. This can further strengthen the adhesion between the electrode plates and the separator and increase the wettability of the electrolyte solution.

[0042] In some embodiments, the first solvent comprises an organic compound of carbonate and / or carboxylic acid ester with a dielectric constant of ≤ 10. The first solvent comprises one or more compounds of dimethyl carbonate (with a dielectric constant of 3.17), diethyl carbonate (with a dielectric constant of 2.82), ethyl methyl carbonate (with a dielectric constant of 2.9), ethyl acetate (with a dielectric constant of 6.02), methyl acetate (with a dielectric constant of 6.0), propyl acetate (with a dielectric constant of 5.5), methyl propionate (with a dielectric constant of 7.72), propyl formate (with a dielectric constant of 7.16), ethyl formate (with a dielectric constant of 8.5), and methyl formate (with a dielectric constant of 2.9).If the condition 3 ≤ (a+b) / (X / Y) ≤ 60 is met, further selection of the organic compound of carbonate and / or carboxylic acid ester with a dielectric constant ≤ 10 as the first solvent can achieve a further reduction in the viscosity of the electrolyte solution, an increase in the dynamic properties, an improvement in the transfer of lithium ions, an increase in the wettability and a reduction in the DCR of the battery.

[0043] In some embodiments, the first additive comprises a fluorobenzene compound and / or a fluoroether compound.

[0044] In some embodiments, the fluorobenzene compound comprises one or more compounds of 1,3,5-trifluobenzene, 1-fluorobenzene, 1,3-difluorobenzene, and 1,4-difluorobenzene.

[0045] In some embodiments, the fluoroether compound comprises one or more compounds of 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether, 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, and 2,2,2-trifluoroethyl ether.

[0046] If the condition 3 ≤ (a+b) / (X / Y) ≤ 60 is met, further selection of the above-mentioned compound as the first additive can enable better interaction with the first solvent to increase the efficiency of lithium ion transfer, further reduce the viscosity of the electrolyte solution, and, according to the principle of "like dissolves like", accelerate wetting with respect to the adhesive layer.

[0047] In some embodiments, the electrolyte solution further comprises a second additive. The second additive comprises at least one compound of vinyl carbonate (VC), fluoroethylene carbonate (FEC), 1,3,2-dioxathiolane-2,2-dioxide (DTD), methylenemethanedisulfonate (MMDS), succinonitrile (SN), adiponitrile (AND), glutaronitrile (GN), hexanetricarbonitrile (HTCN), ethylene glycol bis(propionitrile) ether (DENE), tris(2-cyanoethoxy)propane (TCP), tetravinvylsilane (TVS), tris(trimethylsilyl)borate (TMSB), hexamethyldisilazane (HMDS), triphenylphosphite (TPPi), and ethoxy(pentafluoro)cyclotriphosphazene (PFPN).

[0048] To further enhance battery safety, the invention further provides that the positive electrode plate comprises a current collector for the positive electrode and tabs for the positive electrode, wherein at least one of the tabs is provided on one side of the current collector for the positive electrode in the lateral direction of the positive electrode plate, and wherein a ceramic coating is provided on a lateral edge of the positive electrode plate in the lateral direction. With such an arrangement, the formation of burrs that puncture the separator can be effectively reduced, thereby lowering the risk of a battery short circuit.

[0049] In some embodiments, as in Fig.Figure 3 shows the positive electrode plate, a positive current collector (not shown in the figure), and a tab 6 for the positive electrode. The tab 6 for the positive electrode is arranged on one side of the current collector for the positive electrode in the width direction of the positive electrode plate. A ceramic coating 7 is provided on one side of the positive electrode plate facing the tab 6 for the positive electrode in the width direction. The area marked D represents the thickness of the ceramic coating 7.

[0050] According to the invention, an active material layer for the positive electrode is provided on the surface of at least one side of the current collector for the positive electrode, which borders on the ceramic coating or at least partially overlaps it.

[0051] In some embodiments, the width D of the ceramic coating is 1 mm to 5 mm. The width of the ceramic coating can be, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or any specific value within a range between two of the aforementioned values. If the width of the ceramic coating lies further within the aforementioned range, the problems of incomplete coverage of the edge of the positive electrode plate leading to a short circuit in the battery can be avoided. Conversely, if the ceramic coating is too narrow, it occupies too much space on the electrode plate, increasing the mass of inactive material and thus reducing the energy density of the battery.

[0052] In some embodiments, the ceramic coating comprises ceramic particles. The ceramic particles are selected from at least one compound of inorganic metal oxides, inorganic metal nitrides, and inorganic metal salts. Examples of inorganic metal oxides include boehmite, aluminum oxide, magnesium oxide, calcium oxide, titanium dioxide, silicon dioxide, and zirconium dioxide. Examples of inorganic metal nitrides include tungsten nitride, carbon nitride, boron nitride, aluminum nitride, titanium nitride, and magnesium nitride. Examples of inorganic metal salts include barium sulfate, calcium titanate, and barium titanate.

[0053] In some embodiments, the ceramic particles have DV50 dimensions of 0.05 µm to 3 µm and / or DV90 dimensions of 0.3 µm to 6 µm. The value of DV50 can be, for example, 0.05 µm, 0.1 µm, 0.5 µm, 1 µm, 1.5 µm, 2 µm, 2.5 µm, 3 µm, or any specific value within a range between any two of the above-mentioned specific values. The value of DV90 can be, for example, 0.3 µm, 0.6 µm, 1 µm, 2 µm, 3 µm, 4 µm, 5 µm, 6 µm, or any specific value within a range between any two of the aforementioned values. If the DV50 and / or DV90 of the ceramic particles are further within the aforementioned range, the ceramic particles can be more evenly distributed to form a smoother and denser ceramic coating, thereby reducing the risk of a short circuit within the battery and increasing battery safety.

[0054] In some embodiments, the ceramic coating further comprises a binder which may include at least one compound of polyvinylidene fluoride (PVDF), hexafluoroethylene, polytetrafluoroethylene, methacrylates, and styrene-butadiene rubbers.

[0055] The technical solutions according to the invention are described clearly and completely below with reference to the exemplary embodiments according to the invention. Naturally, the described exemplary embodiment does not represent all but only a portion of the exemplary embodiments according to the invention. Based on the exemplary embodiment in the present invention, the other exemplary embodiments, which can be obtained by a person skilled in the art without inventive step, are intended to fall within the scope of protection of the present invention.

[0056] Unless otherwise stated, the materials and agents used in the following examples are commercially available.

[0057] The invention is described in more detail below in connection with specific embodiments which serve to provide a better understanding of the invention without limiting it.

[0058] The batteries of the examples according to the invention and the comparative examples are manufactured according to the following manufacturing process, and their deviations from Example 1-1 are explained below. Example 1-1(1) Preparation of an electrolyte solution

[0059] In a glove compartment under argon with a water content of < 0.1 ppm and an oxygen content of < 0.1 ppm,

[0060] Ethylene carbonate (EC, with a dielectric constant of 89.6), ethyl methyl carbonate (EMC, with a dielectric constant of 2.9), and dimethyl carbonate (DMC, with a dielectric constant of 3.17) were homogeneously mixed. Completely dried lithium hexafluorophosphate (LiPF6) was added and stirred until dissolved. The mass of LiPF6 used was 9% of the total mass of the electrolyte solution. Then, completely dried lithium bis(fluorosulfonyl)imide (LiFSI) was added and stirred until dissolved. The mass of LiFSI used was 6% of the total mass of the electrolyte solution. To this end, 1% 1-fluorobenzene (FB, with a dielectric constant of 4.7) based on the total mass of the electrolyte solution, as well as 2.5% vinylene carbonate (VC), 0.5% fluoroethylene carbonate (FEC) and 0.5% 1,3,2-dioxathiolane-2,2-dioxide (DTD), each based on the total mass of the electrolyte solution, were added and stirred homogeneously.The desired electrolyte solution was obtained when it qualified in the physical property tests. The first solvent from EMC and DMC comprised 60% of the total mass of the electrolyte solution, and the mass ratio between them was 5:2. (2) Production of a positive electrode plate

[0061] Lithium iron phosphate (LFP), polyvinylidene fluoride, and carbon black were dosed in a mass ratio of 97:2:1 in a vacuum stirrer, and N-methylpyrrolidone (NMP) was added. The mixture was thoroughly blended in the vacuum stirrer until a homogeneous, highly free-flowing slurry for the positive electrode with a solids content of 60 wt% was obtained. The slurry for the positive electrode described above was uniformly coated onto a 13 µm thick aluminum foil, dried, rolled, cut into strips, and punched out to obtain the desired positive electrode plate.

[0062] A ceramic slurry (consisting of ceramic particles of aluminium with DV50 of 2 µm and DV90 of 5 µm and PVDF) was applied to a current collector located near the lug of the positive electrode, with a coating width of the ceramic slurry of 1 - 3 mm. (3) Production of a negative electrode plate

[0063] Graphite, styrene-butadiene rubber, sodium carboxymethylcellulose, and carbon black were dosed in a mass ratio of 96.5:1.5:1:1 in a vacuum stirrer, and deionized water was added. The mixture was thoroughly blended in the vacuum stirrer to produce a homogeneous, highly flowable slurry for the negative electrode with a solids content of 50 wt%. This slurry was uniformly coated onto a 4.5 µm thick copper foil, dried, rolled, and punched to create the desired negative electrode plate. (4) Battery production

[0064] The positive electrode plate obtained in step (2), the negative electrode plate obtained in step (3), and a separator (polyethylene film) with a PVDF adhesive layer (where the organic particles have DV50 of 400 µm and DV90 of 500 µm) were combined by winding to obtain a crude cell. The crude cell was then placed in a packaging film. The electrolyte solution prepared in step (1) was filled into a dry, qualified cell, allowed to stand under vacuum, vacuum packed, aged, formed, repacked, aged, sorted, etc., to obtain a battery. The height X of the adhesive layer protrusions in the first region and the height Y of the adhesive layer protrusions in the second region are summarized in Table 1. (5) Battery tests(i) DCR test at 25°C and 50% SOC

[0065] The batteries produced in the examples and comparison examples were subjected to the cycle test at a high temperature of 25°C using the following test procedure:

[0066] The battery was placed in an environment at 25±1 °C and remained stationary for 120 minutes; it was discharged to 2.5 V with a constant current at 0.5 C and remained stationary for 30 minutes; it was charged to 3.65 V with a constant current and voltage at 0.5 C, with a cut-off current of 0.05 C, and remained stationary for 30 minutes; it was discharged to 2.5 V with a constant current at 0.5 C, with the discharge capacity C0 recorded, and remained stationary for 30 minutes; it was charged to 3.65 V with a constant current and voltage at 1.0 C, with a cut-off current of 0.05 C, and remained stationary for 30 minutes; It was discharged to 50% SOC at 1 C, i.e., C0 × (1-50%SOC), and then placed in an environment at 25±1 °C and remained stationary for 120 minutes; it was discharged at 3C for 10 S (with a sampling time of 100 ms).The voltage at the end of standstill is denoted as V1, the voltage at the end of discharge as V2, and the possible discharge current as I, so that the DCR at 25°C and 50% SOC is calculated by the following equation: DCR=(V1−V2) / I. (ii) Test for cycles at a high temperature of 45°C

[0067] The batteries produced in the examples and comparison examples were subjected to the cycle test at a high temperature of 45°C using the following test procedure:

[0068] The battery was placed in an environment at 45±1 °C and remained stationary for 180 minutes; it was discharged to 2.5 V with a constant current at 0.5 C and remained stationary for 30 minutes; it was charged to 3.65 V with a constant current and voltage at 0.5 C, with a cut-off current of 0.05 C, and remained stationary for 30 minutes; it was discharged to 2.5 V with a constant current at 0.5 C, with the discharge capacity C0 recorded, and remained stationary for 30 minutes; it was charged to 3.65 V with a constant current and voltage at 1.0 C0, with a cut-off current of 0.05 C0, and remained stationary for 30 minutes; it was discharged to 2.5 V with a constant current at 1.0 C0. During the nth cycle, the last discharge capacity Cn was recorded, so the retention rate for capacity of the nth cycle is calculated by the following equation: Retention rate for capacity (%)=Cn / C0×100%. (iii) Air permeability of the separator

[0069] The batteries, as described in the examples and comparison examples, were disassembled, the separator was removed, and three pieces were cut from it, spaced 150 mm apart lengthwise. If the separator had a width ≥ 100 mm, a 100 mm × 100 mm sample was taken. If the separator had a width < 100 mm, a 100 mm × the width of the separator sample was taken. The separator was placed in the probe of an air permeability meter for a suitable test range to measure air permeability, and the average of the three measurements represented the separator's air permeability. Higher air permeability indicates worse blockage of the adhesive layer's pores.

[0070] Examples 1 to 3, as well as comparison examples 1-3, were carried out according to example 1-1, and Table 1 summarizes the main differences between them. In examples 1, the mass fraction a of the first solvent in the electrolyte solution was changed. In examples 2, the mass fraction b of the first additive was changed. In examples 3, the thickness of the adhesive layer in the first and second regions of the separator was changed by adjusting the adhesive layer thickness. In comparison example 1, the mass fraction of the first solvent was too low to satisfy condition 3 ≤ (a+b) / (X / Y) ≤ 60. In comparison example 2, no first additive was added. In comparison example 3, the mass fractions of the first solvent and the first additive were adjusted such that condition 3 ≤ (a+b) / (X / Y) ≤ 60 was not satisfied. Table 1 Proportion of first solvent (%) Proportion of the first additive b% Height of the adhesive layer in the first area X / µm Height of the adhesive layer in the second area Y / µm a+b X / Y (a+b) / (X / Y) DCR / mΩ Retention rate for capacity at 500T cycles at high temperature of 45°C / % Air permeability of the separator(s) Example 1-1 60 1 5 2 61 2,5 24,4 21,86 94,01 108,0 Example 1-2 10 1 5 2 11 2,5 4,4 30,92 91,83 106,5 Examples 1-3 80 1 5 2 81 2,5 32,4 18,39 92,75 107,1 Examples 1-4 8 1 5 2 9 2,5 3,6 31,07 89,52 107,6 Example 2-1 60 5 5 2 65 2,5 26 20,16 93,49 108,3 Example 2-2 60 0,5 5 2 60,5 2,5 24,2 23,08 93,08 107,8 Example 2-3 60 10 5 2 70 2,5 28 19,01 92,86 108,1 Example 2-4 60 0,1 5 2 60,1 2,5 24,04 26,55 89,78 108,9 Example 3-1 60 1 0,5 0,2 61 2,5 24,4 28,39 92,96 156,2 Example 3-2 60 1 10 5 61 2 30,5 26,41 93,01 98,8 Comparative example 1 5 1 5 2 6 2,5 2,4 38,16 88,75 108,1 Comparative example 2 60 / 5 2 60 2,5 24 25,32 91,80 107,4 Comparative example 3 10 0,5 5 1 10,5 5 2,1 40,01 87,69 170,2

[0071] Note: “ / ” means no addition of the first additive.

[0072] Table 1 shows that, according to the invention, by adding the first solvent with a dielectric constant ≤ 10 and the first additive with a dielectric constant ≤ 10, and by adjusting the mass fraction (a) of the first solvent in the electrolyte solution, the mass fraction (b) of the first additive in the electrolyte solution, the height (X) of the adhesive layer protrusions in the first region, and the height (Y) of the adhesive layer protrusions in the second region to meet the condition 3 ≤ (a+b) / (X / Y) ≤ 60, a significant increase in adhesion between the separator and the electrode plates is achieved with a reduced DCR of the battery. This effectively solves the problem of wetting with the electrolyte solution due to the blocking of the pores by the separator's adhesive layer, and also improves the cyclic retention rate at high temperatures and the air permeability of the separator.

[0073] Examples in Group 4 and Group 5 were carried out according to Example 1-1, and Table 2 summarizes the main differences between them. In Examples 4, the mass fraction c of LIFSI in the electrolyte solution was changed, whereas in Example 4-4 no LIFSI was added to the electrolyte solution. In Examples 5, the mass fraction d of LiPF6 in the electrolyte solution was changed. Table 2 LIFSIc share% Percentage of LiPF6d CD c / 15+d / 12.5 DCR / mΩ Retention rate for capacity at 500T cycles at high temperature of 45°C / % Example 1-1 6 9 0,68 1,12 21,86 94,01 Example 4-1 12 9 1,33 1,52 18,28 93,51 Example 4-2 1 9 0,11 0,79 25,34 92,74 Example 4-3 20 5 4 1,73 27,22 91,30 Example 4-4 / 9 / / 29,24 87,35 Example 5-1 6 15 0,4 1,60 23,02 93,39 Example 5-2 6 1 6 0,48 30,04 87,19

[0074] Note: “ / ” means no check of the corresponding parameter.

[0075] Table 2 shows that the addition of lithium bis(fluorosulfonyl)imide (LIFSI) and lithium hexafluorophosphate (LiPF6) to the electrolyte solution, when conditions 3 ≤ (a+b) / (X / Y) ≤ 60 and 1.0 ≤ c / 15+d / 12.5 ≤ 1.6 are met, leads to a further reduction in the viscosity of the electrolyte solution, an increase in electrical conductivity, a reduction in internal resistance and an improvement in the cyclic retention rate for capacity with increased wettability and a reduced DCR of the battery.

[0076] The examples in Group 6 were carried out according to Example 1-1, and the main differences between them are summarized in Table 3. In the examples in Group 6, the mass fraction m of the second solvent in the electrolyte solution was changed. Table 3 Content of the first solvent a% Content of the second solution Is m% m / a DCR / m Ω Retention rate for capacity at 500T cycles at high temperature of 45°C / % - 60 20,5 0,342 21,86 94,01 Example 6-1 60 15,0 0,250 19,38 92,37 Example 6-2 60 10,0 0,167 17,06 91,83

[0077] Table 3 shows that an effective increase in performance at high temperatures and dynamics, as well as a reduction in the internal resistance of the battery, is achieved when the condition 3 ≤ (a+b) / (X / Y) ≤ 60 is met and furthermore m and a 0.25 ≤ m / a < 1.0 applies.

[0078] The examples in Group 7 were carried out according to Example 1-1, and Table 4 summarizes the main differences between them. In the examples in Group 7, the area fraction of the adhesive layer was changed by controlling the coating process of the adhesive layer. Table 4 Area percentage of the adhesive layer DCR / mΩ Retention rate for capacity at 500T cycles at high temperature of 45°C / % Air permeability of the separator / s Example 1-1 20 21,86 94,01 108,0 Example 7-1 10 25,12 93,18 95,6 Example 7-2 60 30,34 92,42 178,2

[0079] Table 4 shows that high adhesion between the electrode plates and the separator is ensured when the wettability of the electrolyte solution is increased and the DCR of the battery is reduced, provided that 3 ≤ (a+b) / (X / Y) ≤ 60 and the area fraction of the adhesive layer is in the range of 10% - 60%.

[0080] It should be noted that the terms "include," "contain," or any variant thereof are used here to mean inclusive inclusion, so that a series of processes, procedures, articles, or facilities containing certain elements may also include other, unlisted elements or elements inherent to such processes, procedures, articles, or facilities. Unless otherwise specified, the phrase "includes" does not preclude the possibility that the processes, procedures, articles, or facilities containing that element may also contain one or more other identical elements.It should also be noted that the scope of the procedures and facilities described in the application is not limited to performing the functions in the sequence shown or specified, but may also include performing the functions in question essentially simultaneously or in a reverse order. For example, the described procedure may be carried out in a different sequence than the one described, and various steps may also be added, removed, or combined. Furthermore, the features described with reference to some examples may be combined in a further example.

[0081] Only the preferred embodiments of the present invention have been described above, but the invention is not intended to be limited thereto. All modifications and equivalent substitutions that fall within the scope of the idea and principle of the invention are to be included within the scope of protection of the invention.

Claims

[1] Battery, characterized by , that the battery comprises a positive electrode plate, a separator and a negative electrode plate, which are laminated, wherein the separator comprises a first region in which the separator projects beyond the positive electrode plate in the width direction of the separator, wherein the separator comprises a base film which is provided with an adhesive layer at least on one side facing the positive electrode plate, wherein in the width direction of the separator the separator further comprises a second region between the positive and negative electrode plates, wherein the height of the protrusions of the adhesive layer in the first region is referred to as X µm and the height of the protrusions of the adhesive layer in the second region is referred to as Y µm, wherein the battery further comprises an electrolyte solution comprising a first solvent having a dielectric constant of ≤ 10 and a first additive having a dielectric constant of ≤ 10, wherein, with respect to the total mass of the electrolyte solution, the mass fraction of the first solvent is referred to as a and the mass fraction of the first additive as b, where for X, Y, a and b: 3 ≤ (a+b) / (X / Y) ≤ 60. [2] Battery according to claim 1, characterized by , where for X, Y, a and b: 7.5 ≤ (a+b) / (X / Y) ≤ 37.5, preferably for X / Y: 1.5 ≤ X / Y ≤ 10, more preferably 2 ≤ X / Y ≤ 6, preferably for X: 0.5 ≤ X ≤ 10, and / or for Y: 0.2 ≤ Y ≤ 5. [3] Battery according to claim 1, characterized by , where for a + b: 30 ≤ a + b ≤ 85, preferably 45 ≤ a + b ≤ 75, preferably for a: 10 ≤ a ≤ 80, more preferably 30 ≤ a ≤ 70, preferably for b: 0.5 ≤ b ≤ 10, more preferably 1 ≤ b ≤ 5. [4] Battery according to claim 1, characterized by , that the electrolyte solution further comprises lithium bis(fluorosulfonyl)imide, wherein the mass percentage of lithium bis(fluorosulfonyl)imide in relation to the total mass of the electrolyte solution is referred to as c, wherein the electrolyte solution further comprises lithium hexafluorophosphate, wherein the mass percentage of lithium hexafluorophosphate in relation to the total mass of the electrolyte solution is referred to as d, where c and d are: 1.0 ≤ c / 15+d / 12.5 ≤ 1.

6. [5] Battery according to claim 4, characterized by , where for c and d the following holds: 0.1 ≤ c / d ≤ 3, preferably for c: 1 ≤ c ≤ 20, more preferably 3 ≤ c ≤ 10, preferably for d: 1 ≤ d ≤ 20, more preferably 5 ≤ d ≤ 15. [6] Battery according to any one of claims 1-5, characterized by, that the electrolyte solution further comprises a second solvent having a dielectric constant of ≥ 10, where, in relation to the total mass of the electrolyte solution, the mass fraction of the second solvent is denoted as m, where for m and a: 0.25 ≤ m / a < 1.0, preferably for m: 5 ≤ m ≤ 40, more preferably 20 ≤ m ≤ 30, and wherein preferably the second solvent comprises a cyclic carbonate compound with a dielectric constant of ≥ 10. [7] Battery according to any one of claims 1-5, characterized by , that an adhesive layer is provided on the surface of one side of the base film facing the negative electrode plate and an inorganic coating is provided on the surface of one side of the base film facing the positive electrode plate, wherein an adhesive layer is provided on the surface of one side of the inorganic coating facing away from the base film, wherein preferably the adhesive layer comprises several spaced-apart areas with adhesive dots, wherein the areas with adhesive dots have an average diameter of 50 µm to 1000 µm, and wherein preferably the surface area of ​​the adhesive layer on the inorganic coating or base film is 10% - 60%. [8] Battery according to claim 7, characterized by , that the adhesive layer comprises organic particles comprising one or more compounds of polyvinylidene fluoride, vinylidene fluoride-hexafluoropropylene copolymers, polyacrylic resin, polymethyl acrylate, butyl acrylate-acrylonitrile copolymers, polyacrylonitrile, ethylene-propylene copolymers, and polyethyl acrylate, wherein the organic particles preferably have DV50 of 300 µm - 500 µm and / or DV90 of 100 µm - 800 µm. [9] Battery according to any one of claims 1-5, characterized by, that the first solvent comprises an organic compound of carbonate and / or carboxylic acid ester with a dielectric constant of ≤ 10, wherein preferably the first solvent comprises one or more compounds of dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, ethyl acetate, methyl acetate, propyl acetate, methyl propionate, propyl formate, ethyl formate, and methyl formate, wherein preferably the first additive comprises a fluorobenzene compound and / or a fluoroether compound, wherein preferably the fluorobenzene compound comprises one or more compounds of 1,3,5-trifluorobenzene, 1-fluorobenzene, 1,3-difluorobenzene, and 1,4-difluorobenzene, and / or the fluoroether compound comprises one or more compounds of 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether, 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, and 2,2,2-trifluoroethyl ether. [10] Battery according to any one of claims 1-5, characterized by, that the positive electrode plate comprises a current collector for the positive electrode and tabs of the positive electrode, wherein at least one of the tabs is provided on one side of the current collector for the positive electrode in the width direction of the positive electrode plate, wherein a ceramic coating is provided on a lateral edge of the positive electrode plate in the width direction, wherein preferably the width D of the ceramic coating is 1 mm - 5 mm, and wherein the ceramic coating preferably comprises ceramic particles having DV50 of 0.05 µm - 3 µm and / or DV90 of 0.3 µm - 6 µm.

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