Layered oxide positive electrode material and preparation method thereof, and application to sodium battery
By performing three-point doping and shuttle ion doping on layered oxide cathode materials, the problems of structural instability and slow sodium ion diffusion during charge and discharge processes were solved, thereby improving the cycle stability and diffusion rate of the material.
Patent Information
- Application Number
- CN202610197021.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-11
- Publication Date
- 2026-05-19
- Estimated Expiration
- 2046-02-11
AI Technical Summary
Layered oxide cathode materials are prone to harmful phase transitions and structural degradation during charge-discharge cycles, leading to blockage of ion channels and hindered sodium ion diffusion, which affects long-term cycle stability and coulombic efficiency.
A three-point doping strategy is adopted, which involves doping the sodium storage layer, the cation sites of the transition metal layer, and the anion sites of the transition metal layer, and introducing shuttle ion doping, which shuttles between the transition metal layer and the sodium storage layer to dynamically fill vacancies, thereby stabilizing the material structure and improving the sodium ion diffusion rate.
It improves the structural stability and sodium ion diffusion rate of the material, enhances the material's flexibility, solves the problems of cycling instability and slow diffusion, and achieves better cycling performance and electrochemical performance.