Negative active material, secondary battery, and electronic apparatus
AssigneeNingde Amperex Technology Limited
InventorsZigui Zheng, Zheng Yi, Yuansen Xie
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Abstract
A negative active material includes composite particles. The composite particle includes a first region and a second region, where the first region includes a disordered carbon structure, and the second region includes an ordered carbon structure and/or a metal oxide structure. The negative active material of this application has a high gram capacity and active ion diffusion coefficient, so that a secondary battery containing such negative active material has a high energy density and excellent cycling performance, rate performance, and fast charging capacity.
Claims17
A negative active material, comprising composite particles;
- wherein each composite particle comprises a first region and a second region, the first region comprises a disordered carbon structure, the second region comprises an ordered carbon structure and/or a metal oxide structure, and a surface of the each composite particle comprises the first region.
A secondary battery, comprising a negative electrode, the negative electrode comprising a negative active material layer and a current collector, wherein the negative active material layer comprises a negative active material, wherein the negative active material comprises composite particles, wherein each composite particle comprises a first region and a second region, the first region comprises a disordered carbon structure, the second region comprises an ordered carbon structure and/or a metal oxide structure, and a surface of the each composite particle comprises the first region.
An electronic apparatus, comprising a secondary battery, the secondary battery comprising a negative electrode, the negative electrode comprising a negative active material layer and a current collector, wherein the negative active material layer comprises a negative active material, wherein the negative active material comprises composite particles, wherein each composite particle comprises a first region and a second region, the first region comprises a disordered carbon structure, the second region comprises an ordered carbon structure and/or a metal oxide structure, and a surface of the each composite particle comprises the first region.
Dependencies are inferred from the claim text.