A Low-Temperature Resistant Cathode Material, Its Preparation Method and Application

By designing a low-temperature resistant cathode material with a core and outer layer structure, the problem of poor discharge performance of phosphate series materials in low-temperature environments has been solved, achieving efficient lithium-ion diffusion and discharge capabilities, reducing production costs, and expanding the application range of the material.

CN115602815BActive Publication Date: 2026-05-26LIYANG TIANMU PILOT BATTERY MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202211280910.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-19
Publication Date
2026-05-26
Estimated Expiration
2042-10-19

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Abstract

This invention relates to a low-temperature resistant cathode material, its preparation method, and its application. The low-temperature resistant cathode material comprises a two-layer structure: a core and an outer layer. The core includes a first component and a second component. The first component is an olivine-structured cathode material with a particle size of 100 nm–30 μm, and the second component is a solid electrolyte material with a particle size of 10 nm–2 μm. The second component is uniformly embedded in the first component, forming a mixed material with a particle size of 100 nm–50 μm. The outer layer is Li. x A y B z Materials, wherein A includes one or more of copper, iron, nickel, manganese, vanadium, carbon, and phosphorus; B includes one or more of N, O, F, S, Cl, and Br, and 1≤x≤5, 1≤y≤2.2; 1≤z≤4; the outer layer Li x A y B z The material particles are uniformly covered on the surface of the mixture material, forming a coating structure with a coverage of 60%-100%.
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