基于有机-无机杂化包覆层的正极材料、制备方法与应用
By employing a three-layer structure of organic-inorganic hybrid coating on the surface of the cathode material, mechanical stress caused by thermal expansion is alleviated, electrolyte corrosion is neutralized, and microcrack self-repair is achieved. This solves the stability and transport efficiency problems of existing cathode materials under high-temperature environments and improves the performance of lithium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JINGMEN GEM NEW MATERIAL CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-17
AI Technical Summary
Existing cathode materials are prone to structural changes during charging and discharging, leading to rapid capacity decay. They are also prone to thermal decomposition reactions at high temperatures, reducing battery safety and electrochemical performance. Furthermore, existing coatings cannot balance lifespan and lithium-ion transport efficiency.
A cathode material based on an organic-inorganic hybrid coating layer is adopted, which includes a three-layer structure of a core, a buffer layer and a dopamine-modified dielectric layer. The uniform coating of the dopamine-modified dielectric layer is achieved by fluidized bed chemical vapor deposition, which buffers the difference in thermal expansion coefficient, neutralizes the acid corrosion of the electrolyte, improves conductivity and realizes dynamic self-repair of microcracks.
It improves the stability and lifespan of the battery under high-temperature conditions, optimizes the lithium-ion transport channel, reduces interface impedance, improves the charge and discharge efficiency and rate performance of the battery, and extends the lifespan of the lithium-ion battery.
Smart Images
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