A positive electrode material, a synthesis method and application thereof
By leveraging the synergistic effect of high-entropy doping and coating layers, the structural degradation of medium-nickel cathode materials under high voltage was solved, improving their electrochemical performance and safety, and achieving a balance between high capacity and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SVOLT ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, medium-nickel cathode materials are prone to structural degradation, lithium-nickel mixing, microcracks, and oxygen release under high voltage, which leads to a decline in electrochemical performance and makes it difficult to improve safety performance without sacrificing high capacity.
The cathode core and coating structure are highly entropy-doped. The core is formed by doping with elements such as Sr, Ti, Al and W to form strong chemical bonds, and the outer coating is composed of LiCoO2, Al, W and Ti. This synergistic effect enhances the material stability and lithium-ion diffusion, and suppresses structural degradation and oxygen release.
This study achieved high capacity for medium-nickel cathode materials while enhancing structural stability and lithium-ion diffusion, reducing volume changes, improving battery cycle stability and safety performance, and reducing the risk of thermal runaway.
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