Abstract: A composite positive electrode material is Li[LixNiaCobMncMd]O2, where x+a+b+c+d=1, 0<a, b, and c<1, 0?d?0.05, 0?x, and the element M includes one or more of Al, B, Zr, Sr, Y, Sb, Ta, Na, K, W, Ti, Mg, Nb, Hf, Mo, and Ce. A span of the composite positive electrode material is 1.2-2.0. The composite positive electrode material includes first and second lithium-rich manganese-based positive electrode materials. The first lithium-rich manganese-based positive electrode material includes rod-like primary particles with a length of 0.1-1.5 ?m and secondary particles with Dv50 of 3-8 ?m. The second lithium-rich manganese-based positive electrode material includes spheroidal primary particles with a diameter of 0.1-400 nm and secondary particles with Dv50 of 8-20 ?m.

Abstract: A lithium-ion battery and a battery module, a battery pack, and an electric apparatus containing the same are provided. The lithium-ion battery includes a positive electrode active material layer including a positive electrode active material and a pre-lithiation agent and an electrolyte including an additive, where the pre-lithiation agent is a lithium metal oxide pre-lithiation agent, the additive includes at least one of compound 1 shown in constitutional formula (I) and compound 2 shown in constitutional formula (II) below. In the following constitutional formula (I), R1 is an oxygen atom or methylene, and R2 is a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms, a halogenated alkyl group having 1 to 3 carbon atoms.

Abstract: The present application discloses a capacity compensation additive and a preparation method therefor, as well as a positive electrode plate, a battery and an electrical apparatus. The capacity compensation additive includes a capacity compensation agent and a catalyst-containing carbon material, and the catalyst-containing carbon material is coated on at least a portion of a surface of the capacity compensation agent.

Abstract: This application discloses a composite material and a preparation method therefor, a positive electrode plate, a cell, a battery, and an electric device, and belongs to the field of battery technologies. A composite material includes a lithium-containing compound, a catalyst, and a carbon material. The carbon material has a hollow tubular structure, and the lithium-containing compound and the catalyst are arranged in the tubular structure. The lithium-containing compound includes lithium, carbon, and oxygen. The catalyst includes at least one of a transition metal oxide, a transition metal carbide, or a transition metal nitride. Technical solutions of embodiments of this application can improve a capacity of a cell.

Abstract: A modified lithium-rich manganese-based material, a modification method of a lithium-rich manganese-based material, a secondary battery and an electrical device are provided. The modified lithium-rich manganese-based material includes a lithium-rich manganese-based material co-doped with anion and cation and a fast ionic conductor material. The lithium-rich manganese-based material has a chemical formula of xLi2MnO3·(1?x)LiNiyCozMnaO2, where 0<x<1, 0?y?1, 0?z?1, and y+z+a=1. A doped cationic element M1 is selected from at least one of a group consisting of Na, Fe, Nb, Ti, Mg, Al, Cr, and Er, and a doped anionic element M2 is selected from at least one of a group consisting of F, Cl, Br, I, S, B, P, N, Se, and Te. The first efficiency, cycle stability, thermal stability, rate performance and capacity of the material are improved.

Abstract: A positive electrode active material comprises a lithium-rich manganese-based positive electrode material and a coating layer distributed on at least a portion of the surface of the lithium-rich manganese-based positive electrode material, wherein the coating layer comprises at least one of a metal oxide and a metal fluoride. The positive electrode active material has a gram capacity of greater than or equal to 220 mAh/g, and satisfies at least one of the following conditions: the oxygen defect indicator is greater than or equal to 2.12; the microscopic stress is 0.1%-1.5%; in a Fourier infrared spectrum, the M-O/Mn—O peak intensity ratio is 25-40; and the specific surface area is 0.9 m2/g-3.5 m2/g.

Abstract: The present application provides a sodium-doped lithium-rich metal oxide material and a preparation method thereof, a positive electrode material, a positive electrode plate, a battery, and an electric apparatus. The sodium-doped lithium-rich metal oxide material includes a compound Lim-xNaxMOy. The sodium-doped lithium-rich metal oxide material of the present application facilitates reducing the resistance to lithium-ion extraction from the crystal lattice, thereby increasing the charging capacity of the battery.

Abstract: A lithium-sodium composite manganese-based material and a preparation method thereof, a positive electrode plate, a secondary battery, and an electric apparatus. The lithium-sodium composite manganese-based material includes LitNay[LixNiaCobMncMa]ApOg, where 0<y?0.2, 0.68?t+y?1, x+a+b+c+d=1, x>0, a?0.17, 0?b<0.1, c?0.4, 0?d<0.04, 0?p?0.1, 0<q?2; M includes one or more of V, Nb, Ta, Cr, Mo, B, Al, Ti, Zr, Mg, Ce, Fe, W, or Sn, and A includes one or more of F, S, N, or Cl.

Abstract: Embodiments of this application provide a positive electrode active material, a battery cell, a battery, and a power consuming apparatus. The positive electrode active material includes: a matrix, where a chemical formula of the matrix is Li[LixNiaCobMncMd]O2, M includes at least one of Mg, Nb, Cr, Ce, Fe, Ta, B, Al, V, Ti, Zr, Sn, P, and Mo, x+a+b+c+d=1, x>0, a>0, 0<b<0.1, c>0, and d?0; and a coating layer, where the coating layer is disposed on a surface of the matrix, and the coating layer includes boron-containing alloy. The technical solutions of this application can improve an energy retention rate and an initial gram capacity of a battery.

Abstract: A lithium-rich metal oxide and a preparation method thereof, a positive electrode plate, a battery cell, and a battery are described. The lithium-rich metal oxide includes a lithium-rich metal oxide core and residual lithium on a surface of the lithium-rich metal oxide core. Based on 100 wt % as a total mass of the lithium-rich metal oxide, a mass percent k of the residual lithium satisfies: k?0.5 wt %, and a lithium-ion diffusion coefficient D of the lithium-rich metal oxide satisfies: D?1.0×10?15 cm2/s. When applied to a battery cell, the lithium-rich metal oxide of this application improves performance of the battery cell.

Abstract: A composite positive electrode material is Li[LixNiaCobMd]O2, where x+a+b+c+d=1, 0<a, b, and c<1, 0?d?0.05, 0?x, and the element M includes one or more of Al, B, Zr, Sr, Y, Sb, Ta, Na, K, W, Ti, Mg, Nb, Hf, Mo, and Ce. A span of the composite positive electrode material is 1.2-2.0. The composite positive electrode material includes first and second lithium-rich manganese-based positive electrode materials. The first lithium-rich manganese-based positive electrode material includes rod-like primary particles with a length of 0.1-1.5 ?m and secondary particles with Dv50 of 3-8 ?m. The second lithium-rich manganese-based positive electrode material includes spheroidal primary particles with a diameter of 0.1-400 nm and secondary particles with Dv50 of 8-20 ?m.

Abstract: The present application provides a coated lithium-rich metal oxide material and a preparation method therefor, a method for testing a coating layer in the coated lithium-rich metal oxide material, a positive electrode plate, a battery and a power consuming device. The coated lithium-rich metal oxide material of the present application has a coating layer with high integrity and compactness, which reduces the dissolution of lithium, improves the capacity of the battery, and reduces the resistance of the material. The method of the present application can accurately and quickly test the integrity and compactness of the coating layer in the coated lithium-rich metal oxide material.

Abstract: This application provides a composite positive electrode material and a preparation method thereof, a secondary battery, a battery group including the secondary battery, and an electric apparatus including the secondary battery. The composite positive electrode material includes a lithium-rich metal oxide and a positive electrode active material covering at least a partial surface of the lithium-rich metal oxide, where the positive electrode active material is formed through in-situ reaction between a positive electrode active material precursor and a free lithium compound on the surface of the lithium-rich metal oxide.

Abstract: A positive electrode slurry composition, and a positive electrode sheet prepared thereof, a secondary battery, a battery module, a battery pack and a power consumption apparatus are described. The positive electrode slurry composition includes a positive electrode active material, a pre-lithiation material, and a binder, where the binder is shown in Formula (II) where R1, R2, x, y, and z have meanings defined in the specification, a volume average particle size is D10?0.3 ?m, a volume average particle size D50 is 0.5-10 ?m. The positive electrode slurry composition includes the binder in Formula (II) and the positive electrode active material with a specific particle size range, which is not easy to agglomerate and has high stability, and is conducive to improving machinability of the positive electrode sheet, and the binder in Formula (II) is conducive to improving bonding strength between the positive electrode active material and the pre-lithiation material.

Abstract: This application relates to a positive active material, a method for preparing same, an electrode plate, a secondary battery, and an electrical device. The positive active material includes: a core material, including a lithium-rich manganese-based positive electrode material; and a cladding layer, covering an outer surface of the core material, where the cladding layer includes an oxygen-ion conductor and a lithium-ion conductor.

Abstract: A composite metal oxide material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack and an electrical device are provided. The composite metal oxide material includes a central core and a coating layer on the surface of the central core, in which the central core material has a chemical formula of Li5FexM1-xO4, 0.6?x?1; the coating layer material has a chemical formula of LiMO2, M is one or more metal elements with +3 valence, and the absolute value of the difference between the +3-valence ion radius of Fe and the +3-valence ion radius of M is ?0.02 nm. The composite metal oxide material of the present disclosure makes the secondary battery have high charge capacity, high discharge capacity and long cycle life.

Abstract: Provided are an electrode active material precursor, a method for preparing the same, an electrode active material, and a battery. The electrode active material precursor includes carbon-composite oxide particles. The oxide satisfies a formula (1): MaOb??(1), where element M is selected from one or more of transition metal elements having a relative atomic mass smaller than 65, and optionally being selected from one or more of Ni, Co, Fe, Mn, Zn, Mg, Ca, Cu, Mn, Sn, Mo, Ru, Ir, V, Nb, or Cr, a>0, and b>0. The carbon-composite oxide particles have a powder resistivity smaller than 100 ?·cm.

Abstract: Provided are an electrode active material, a method for preparing the electrode active material, an electrode plate, and a battery. The electrode active material includes carbon-coated metal oxide particles. The metal oxide particles satisfy a formula (2): AcMdOe??(2), where element A is selected from one or more of alkali metal elements or alkaline earth metal elements; element M is selected from one or more of transition metal elements having a relative atomic mass smaller than 65; and c>0, d>0, and e>0.

Abstract: Provided are a lithium-ion battery positive electrode plate, comprising a positive electrode film layer disposed on at least one surface of the positive electrode current collector, wherein the positive electrode film layer comprises a positive electrode active material mixture composed of the following materials: polycrystalline particles of a first positive electrode active material with a particle size of 11.0-20.0 ?m; polycrystalline particles of a second positive electrode active material with a particle size of 6.0-10.5 ?m; and monocrystalline particles of a third positive electrode active material with a particle size of 1.1-5.2 ?m; wherein the number of the polycrystalline particles of the first positive electrode active material is a, the number of the polycrystalline particles of the second positive electrode active material is b, the number of the monocrystalline particles of the third positive electrode active material is c, and (a+b):c is in the range of 5.7:4.3 to 7.7:2.3.

Abstract: This application provides a composite positive-electrode material and a preparation method thereof, a positive-electrode plate, a secondary battery, and a battery module, a battery pack, and an apparatus containing such secondary battery. The composite positive-electrode material includes a core and a coating layer covering at least part of a surface of the core, where the core includes a positive-electrode pre-lithiation material, the positive-electrode pre-lithiation material includes a lithium-rich metal oxide, and the coating layer includes a positive-electrode active material.