Ternary positive electrode material with surface-coated transition layer and preparation method thereof
By coating the surface of the ternary cathode material with an O2-structured transition layer, the problems of improving cycle performance and maintaining capacity in the prior art are solved, and the stability and reversibility of the structure under high voltage are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SICHUAN ENENGI TECHNOLOGY CO LTD
- Filing Date
- 2026-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing strategies for high-entropy doping and surface inert material coating cannot simultaneously improve the cycle performance and maintain the capacity of ternary cathode materials, and cannot suppress the irreversible phase transition of the bulk phase under high voltage.
A transition layer with an O2 structure is coated onto the surface of a ternary cathode material. The O2 structure transition layer is formed by high-temperature solid-state sintering and ion exchange, and combined with the bulk phase of the O3 structure to form a stable coating layer.
This improved the material's cycle stability and reversible capacity under high voltage, suppressed irreversible phase transitions, and maintained the material's capacity and structural stability.
Smart Images
Figure CN122417864A_ABST