一种掺杂型高镍三元正极材料及其制备方法
By introducing tungsten and niobium doping into lithium-ion battery cathode materials and combining it with a segmented calcination process, a high-nickel ternary cathode material with excellent chemical properties and a uniform spherical structure was prepared. This solved the problem of decreased cycle stability and safety performance of the material under high nickel content, and achieved high capacity retention and rapid kinetic performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEFEI GUOXUAN KEHONG NEW ENERGY TECH CO LTD
- Filing Date
- 2023-08-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium-ion battery cathode materials, such as nickel-cobalt-manganese ternary materials and nickel-cobalt-aluminum ternary materials, exhibit decreased cycle stability and safety performance after increasing the Ni content, and their sphericity and particle size are not uniform during the preparation process.
By introducing tungsten and doping with niobium, a surface coating layer of LiNbO3/Li3NbO4 is formed through heat treatment at a specific temperature. Combined with a segmented calcination process, a uniform spherical high-nickel ternary cathode material is prepared, which improves the structural stability and lithium-ion diffusion performance of the material.
It improves the cycling stability and rate performance of the material, reduces capacity loss in the first cycle, and enhances capacity retention during long cycles.
Smart Images
Figure CN116845223B_ABST