Abstract: Disclosed are a homogeneous silicon carbide material and an electrode plate and a battery that include the homogeneous silicon carbide material. A negative electrode plate in the battery of the present disclosure includes a homogeneous silicon carbide material. The homogeneous silicon carbide material includes an element Si and an element C. The homogeneous silicon carbide material is a homogeneous material and has a bi-continuous phase structure. The homogeneous silicon carbide material in the present disclosure has better cycling performance and higher specific capacity.

Abstract: Disclosed is a lithium-ion battery. The lithium-ion battery comprises a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte solution. The non-aqueous electrolyte solution at least comprises FEC and PP; the negative electrode comprises a binder; and the binder is a polymer having a side chain containing hydroxyl, and is a graft polymer that one or more of acrylic acid, acrylonitrile, acrylamide, acrylic acid ester, styrene, vinylimidazole, vinylpyridine, sodium p-styrenesulfonate and the like are graft-copolymerized on the hydroxyl. According to the lithium-ion battery of the present disclosure, a stable SEI interface can be formed on a surface of a silicon-based negative electrode, so that the lithium-ion battery prepared thereby has high energy density, long cycle life and low cycle expansion rate.

Abstract: Disclosed are an organic coating layer, an electrode active material including the organic coating layer, and an electrode and a battery that include the electrode active material. The organic coating layer includes a lithiated polymer, and the polymer is a copolymer of a diisocyanate and an alcohol compound. The organic coating layer in the present disclosure can effectively suppress occurrence of an interface side reaction and electrode expansion, to improve cycling performance of the battery. The electrode active material includes an active material and the organic coating layer coated on a surface of the active material. The electrode active material in the present disclosure has an excellent ionic conductivity and lithium-ion conducting capability.

Abstract: Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. An electrolyte additive includes fluoroethylene carbonate. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2, a content of fluoroethylene carbonate is B2 wt %; and a width of the positive electrode plate is C cm; wherein a ratio of A to B2 is in a range of 0.5-5 and a ratio of A to C is in a range of 1 to 3. The battery can effectively improve high-temperature performance.

Abstract: Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. An electrolyte additive includes lithium difluorophosphate. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2; using a total weight of the non-aqueous electrolyte solution as a reference, a content of lithium difluorophosphate is B4 wt %; and a width of the positive electrode plate is C cm; wherein a ratio of A to B4 is in a range of 5-200 and a ratio of A to C is in a range of 1 to 3. The battery can effectively improve high-temperature performance.

Abstract: Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. An electrolyte additive includes 1,2-bis(cyanoethoxy)ethane and/or 1,2,3-tris(2-cyanoethoxy)propane. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2; a content of 1,2-bis(cyanoethoxy)ethane and/or 1,2,3-tris(2-cyanoethoxy)propane is B56 wt %; and a width of the positive electrode plate is C cm; wherein a ratio of A to B56 is in a range of 2-40 and a ratio of A to C is in a range of 1 to 3. The termination tape includes a substrate and a (meth)acrylic acid termination adhesive layer coated on a surface of the substrate. The battery can effectively improve high-temperature performance.

Abstract: Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. The non-aqueous electrolyte solution includes a non-aqueous organic solvent and a lithium salt. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2; using a total weight of the non-aqueous electrolyte solution as a reference, a content of the lithium salt is B1 mol/L; and a width of the positive electrode plate is C cm; wherein a ratio of A to B1 is in a range of 2-20, and a ratio of A to C is in a range of 1 to 3. The battery can effectively improve high-temperature performance.

Abstract: Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. An electrolyte additive includes fluoroethylene carbonate. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2, a content of fluoroethylene carbonate is B2 wt %; and a width of the positive electrode plate is C cm; wherein a ratio of A to B2 is in a range of 0.5-5 and a ratio of A to C is in a range of 1 to 3. The termination tape includes a substrate and a (meth)acrylic acid termination adhesive layer coated on a surface of the substrate. The battery can effectively improve high-temperature performance.

Abstract: Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. The non-aqueous electrolyte solution includes a non-aqueous organic solvent and a lithium salt. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2; a content of the lithium salt is B1 mol/L; and a width of the positive electrode plate is C cm; wherein a ratio of A to B1 is in a range of 2-20, and a ratio of A to C is in a range of 1 to 3. The termination tape includes a substrate and a (meth)acrylic acid termination adhesive layer coated on a surface of the substrate. The battery can effectively improve high-temperature performance.

Abstract: Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. An electrolyte additive includes 1,2-bis(cyanoethoxy)ethane and/or 1,2,3-tris(2-cyanoethoxy)propane. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2; a content of 1,2-bis(cyanoethoxy)ethane and/or 1,2,3-tris(2-cyanoethoxy)propane is B56 wt %; and a width of the positive electrode plate is C cm; wherein a ratio of A to B56 is in a range of 2-40 and a ratio of A to C is in a range of 1 to 3. The battery can effectively improve high-temperature performance.

Abstract: Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. An electrolyte additive includes lithium difluoro(oxalato)borate. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2; using a total weight of the non-aqueous electrolyte solution as a reference, a content of lithium difluoro(oxalato)borate is B3 wt %; and a width of the positive electrode plate is C cm; wherein a ratio of A to B3 is in a range of 5-200 and a ratio of A to C is in a range of 1 to 3. The battery can effectively improve high-temperature performance.

Abstract: Disclosed are a separator and a lithium-ion battery including the separator. The separator includes a coating; the coating includes a first additive and a second additive, and a mass ratio of the first additive to the second additive ranges from 1:9 to 9:1; and the coating includes a plurality of adhesive layer holes, and a pore diameter of the adhesive layer hole ranges from 0.01 ?m to 10 ?m. In the present disclosure, an electrostatic adsorption capability of a surface on a separator coated with an oil or an oil mixture is reduced, so that fewer particles can be adsorbed, and a self-discharge value of a battery cell can be reduced, thereby improving quality of the battery cell.

Abstract: Disclosed is a separator and a battery including the separator. The separator includes a substrate, heat-resistant layers, and an adhesive layer, the heat-resistant layers are disposed on two opposite surfaces of the substrate, and the adhesive layer is disposed on the heat-resistant layer; and an adhesive force between the adhesive layer and negative electrode is A, a peel force between a heat-resistant layer and the substrate is B, and a ratio of A to B is greater than 1. In the present disclosure, heat-resistant layers of a separator are bonded to a surface of negative electrode, so that it is difficult for the positive electrode and the negative electrode to be shorted at a high temperature, thereby improving safety performance of a battery.

Abstract: Disclosed are a positive electrode material and a preparation method thereof, a positive electrode plate, and a battery. The positive electrode material includes several particles having a polymeric single crystal morphology, and the particle having a polymeric single crystal morphology is formed by nesting several primary particles; and the positive electrode material meets a relational expression shown in Formula 1 as follows: D503=K×n×d503 Formula 1, where K is a coefficient having a range of 0.2?K?2; n is a quantity of primary particles having a range of 2?n?500; D50 is a median particle size of a positive electrode material, in a unit of ?m; and d50 is a median particle size of a primary particle, in a unit of The positive electrode material can ensure good cycling performance, stable high voltage cycling performance and safety performance.

Abstract: Disclosed is a battery, and in an electrochemical impedance spectroscopy (EIS) test of the battery, a charge transfer impedance Rct of the second semicircle in an intermediate frequency region meets: Rct<15 m?; and a slope k of a ray in a low frequency region meets: 1.03<k<57.29. The battery has low charge transfer impedance and lithium ion diffusion resistance during charging and discharging. The battery also has good lithium ion conductivity performance on the premise of having good cycling performance, and is a battery having good cycling performance and improved capacity, as well as good C-rate performance.

Abstract: Disclosed are a negative electrode plate and a battery, the negative electrode plate includes a current collector and an active layer; the active layer is positioned on two opposite surfaces of the current collector; the active layer includes a first functional material; the content of the first functional material increases in a direction away from the current collector; the content of the first functional material in a first region of the active layer is less than the content of the first functional material in a second region of the active layer; the vertical distance from the first region to the current collector is less than the vertical distance from the second region to the current collector; and the first functional material includes at least one of a silicon-based material, a metal oxide, or a metal sulfide. The energy density and dynamics of the negative electrode plate are improved.

Abstract: Disclosed is a lithium-ion battery, where the lithium-ion battery includes a positive electrode active material, and the positive electrode active material includes lithium cobalt oxide particles doped with one or more elements of Al, Mg, Ti, Zr, Ni, Mn, Y, La, Sr, W, or Sc. When the lithium-ion battery is in an SOC of 0%, a molar ratio of an element lithium to an element cobalt in the positive electrode active material is A, and when the lithium-ion battery is in an SOC of 100%, a molar ratio of the element lithium to the element cobalt in the positive electrode active material is B, where 0.62?(A?B)?0.655. The lithium-ion battery provided in the present disclosure has good cycling performance at a high voltage.

Abstract: Disclosed are a negative electrode plate, an electrochemical energy storage apparatus and an electronic apparatus comprising the negative electrode plate. A negative electrode active material of the negative electrode plate includes a first amorphous carbon material. An interlayer spacing d002 of the first amorphous carbon material is greater than 0.34 nm, and an average pore diameter of pores of the first amorphous carbon material ranges from 2 nm to 20 nm. The negative electrode plate can help improve energy density of a lithium-ion battery and suppress expansion of an electrochemical energy storage apparatus during cycling.

Abstract: The present disclosure provides a secondary battery, which includes an additive (a compound represented by Formula 1). The additive (compound represented by Formula 1) can be fully mixed with other components in the secondary battery due to its small molecular weight and short polymer segment. The additive (compound represented by Formula 1) is in a state of viscous liquid, semi-solid or solid at room temperature, which can fully contact each component and be immersed in internal pores. The additive of the present invention can form a film on the positive/negative electrode surface. The additive of the present disclosure can also participate in the film forming reaction of the positive and negative electrodes, and form a solid interfacial film structure with a certain molecular weight on the surfaces of the positive and negative electrodes.

Abstract: The present disclosure provides a negative electrode sheet and a lithium-ion battery including same. A negative electrode active material, a conductive agent, a binder, and an auxiliary agent (a compound represented by Formula 1) are used in the negative electrode sheet of the present disclosure, the above substances are dissolved in a solvent, uniformly mixed, and coated on a surface of a negative electrode current collector, after drying, the negative electrode sheet of the present disclosure can be obtained. The auxiliary agent (the compound represented by Formula 1), due to its small molecular weight and short polymer chain segment, can be fully mixed with the negative electrode active material, conductive agent, and binder.