A lithium titanium phosphate lanthanum lithium-coated magnesium-doped lithium cobalt oxide cathode material and its preparation method
By coating lithium lanthanum titanium phosphate and doping it with magnesium on the surface of lithium cobalt oxide cathode material, a three-dimensional conductive coating layer of NASICON-type fast ion conductor is constructed, which solves the problems of structural instability and electrochemical performance degradation of lithium cobalt oxide under high voltage, and achieves improved electrochemical performance with high capacity and long cycle life.
Patent Information
- Application Number
- CN202211151101.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-09-21
- Publication Date
- 2026-05-26
- Estimated Expiration
- 2042-09-21
AI Technical Summary
Lithium cobalt oxide cathode materials suffer from structural instability and electrochemical performance degradation under high voltage, leading to safety hazards and performance decline. Existing single doping or coating methods cannot meet the requirements of high capacity and long cycle life.
A magnesium-doped lithium cobalt oxide cathode material is constructed by uniformly coating lithium titanium lanthanum lithium phosphate onto the surface of lithium cobalt oxide particles and doping it with magnesium, thereby improving the structural stability and ionic conductivity of the material.
It effectively suppressed the structural phase transition of lithium cobalt oxide during high-voltage charge and discharge, improved the surface stability and electrochemical performance of the material, and achieved long-cycle stability and rapid lithium-ion conduction under high voltage.