Abstract: Disclosed are a negative electrode plate and a lithium-ion battery including the negative electrode plate. The negative electrode plate of the present disclosure includes a current collector, a negative electrode active layer arranged on at least one functional surface of the current collector, and a lithium source; and the negative electrode active layer includes a negative electrode active material and a polymer, the polymer includes a first structural unit, the first structural unit is selected from an olefin compound containing a substituted or unsubstituted ureido group, and the olefin compound includes at least one cyclic group. The negative electrode plate of the present disclosure can effectively supplement a lithium loss of the lithium-ion battery in an application process, so that initial charge/discharge efficiency and cycling performance of the lithium-ion battery are improved.

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 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: An electrode assembly includes at least two electrode plates stacked on each other; the first electrode plate is provided with a first groove, and the first current collector is connected to a first tab in the first groove; the second electrode plate is provided with a first avoidance groove, and the first avoidance groove and the first groove are disposed opposite to each other along a stacking direction of the electrode plates; and the first tab is completely covered by a projection of the first avoidance groove on the first electrode plate. Due to arrangement of an avoidance groove, an increase in a thickness of an electrode assembly caused by a tab may be reduced, so that the thickness of the electrode assembly can be reduced, reducing a volume of the electrode assembly, and further improving an energy density of a battery.

Abstract: An electrode plate includes: an electrode plate body and a tab, the electrode plate body includes a current collector, a first active material layer and a second active material layer; the first active material layer is provided with a groove, a bottom wall of the groove is a first functional surface of the current collector; and the tab is welded to the current collector in the groove to form a welding mark, the welding mark includes a first solder joint and a second solder joint, the first solder joint is located on the tab, the second solder joint is located on the current collector, and the first solder joint and the second solder joint are integrally fused and connected, which effectively enhances a welding strength between the tab and the current collector, so that a reliability of the electrode plate after welding is relatively high.

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 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 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 are a battery, a method for improving battery cycling performance, an electronic device, and a non-transitory computer-readable storage medium. The battery includes an electrolyte solution, where the electrolyte solution includes an organic solvent, a lithium salt, a nitrile substance, and a compound represented by Formula 1. The following relationship is satisfied: 0.055?a?0.1; 0.03?b?0.07; 0.03?c?0.05; and 1.7?(a+b)/c?5.7, where a denotes a voltage reducing amplitude, in a unit of V, obtained during 45° C. high temperature cycling or 45° C. high temperature interval cycling, b denotes a mass percentage of the nitrile substance, and c denotes a mass percentage of the compound represented by Formula 1. The battery has good 45° C. high temperature cycling performance and 45° C. high temperature interval cycling performance.

Abstract: Disclosed are a battery and an electronic device, where the battery includes a first electrode plate, a second electrode plate, a control unit, and a first tab and a second tab that are connected to the first electrode plate, and the first electrode plate and the second electrode plate have opposite polarities. The control unit includes a heating control circuit, and in a case that the battery is connected to an external power supply, the heating control circuit is configured to: when a battery temperature of the battery is less than a first temperature threshold, conduct the first tab, the first electrode plate, and the second tab to heat the battery. A charging speed of the battery at a low temperature may be improved, and lithium deposition and capacity fading of the battery may be slowed down.

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 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. 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 battery and an electronic device, including a housing, a sealing cover, and a battery cell. The housing has an accommodation cavity, and the battery cell is located in the accommodation cavity. The housing is provided with a liquid injection hole. An upper surface of a peripheral edge of the sealing cover is provided with a first step, and the first step divides the sealing cover into a first cover area and a second cover area. The thickness of the second cover area is less than or equal to a thickness of the housing at a seal-welding position with the second cover area. The battery provided in embodiments of the present disclosure has good seal-welding performance, to resolve problems of low battery yields, difficulty in mass production, and failure to achieve expected safety and stability due to poor seal-welding performance.

Abstract: Disclosed are a current collector, an electrode plate, and a battery. The current collector includes a substrate and a conductive coating layer coated on the surface of the substrate, where the conductive coating layer includes alternately arranged raised parts and recessed parts. A plurality of recessed parts are arranged on the conductive coating layer, which may increase the component of the coated active material without increasing the overall thickness, significantly increase the bonding strength of the active material and the conductive coating layer, and improve the conductivity; it can effectively inhibit the thickness expansion of the electrode plate, and solve the problem that the bonding strength of the carbon-containing layer and the active material in the prior art needs to be improved.

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.