Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Limited

Bangrun Wang

Na Liu

Xin Sun

Chengdu Liang

Peipei Chen

Haotian Xie

Yongchao Liu

Chongheng Shen

Xiao Bo Chen

Zhenglun Chen

Xingbu Chen

Zhenguo Zhang

Geng Li

Jiantao Huang

Xiao Chen

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.

Composite positive electrode material and preparation method thereof, secondary battery, battery group including secondary battery, and electric apparatus including secondary battery

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 R, R, x, y, and z have meanings defined in the specification, a volume average particle size is D10≥0.3 μm, a volume average particle size D50 is 0.5-10 μm. 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.

Positive electrode slurry composition, and positive electrode sheet prepared thereof, secondary battery, battery module, battery pack and power consumption apparatus

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 LiFeMO, 0.6≤x≤1; the coating layer material has a chemical formula of LiMO, 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.

Composite metal oxide material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack and electrical device

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.

Composite positive-electrode material and preparation method thereof, positive-electrode plate, secondary battery, and battery module, battery pack, and apparatus containing such secondary battery

A secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive-electrode active substance layer, the positive-electrode active substance layer contains a pre-lithiation agent, and a molecular formula of the pre-lithiation agent is LiNiCuMO, where 1&#x2264;x&#x2264;2, 0&#x3c;a&#x3c;1, and 0&#x2264;b &#x3c;0.1, and M is selected from one or more of Zn, Sn, Mg, Fe, and Mn. The negative electrode includes a negative-electrode active substance layer including graphite and silicon-containing material. The electrolyte contains fluoroethylene carbonate (FEC). A weight percentage of the pre-lithiation agent in the positive-electrode active substance layer, a weight percentage of silicon content in the negative-electrode active substance layer, and a weight percentage of FEC in the electrolyte satisfy 0.2&#xd7;W&#x2264;W&#x2264;7.5%&#x2212;0.6&#xd7;W.

Lithium secondary battery and battery module, battery pack, and electric apparatus containing same

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Ningde, China

Bangrun Wang