Composite double-coated positive electrode material, preparation method thereof and battery
By employing a composite coating technology of cerium oxide buffer layer and reduced graphene oxide coating layer on the surface of high-nickel ternary cathode material, the structural instability and interfacial side reactions of the material during deep charge and discharge processes are solved, thereby improving the thermal stability and electrochemical performance of the material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JINGMEN GEM NEW MATERIAL CO LTD
- Filing Date
- 2026-05-20
- Publication Date
- 2026-07-17
AI Technical Summary
Existing high-nickel ternary cathode materials exhibit structural instability, severe interfacial side reactions, and poor thermal stability during deep charge-discharge processes. Current modification techniques struggle to simultaneously address issues such as oxygen release, interfacial corrosion, and slow charge transport.
By employing a composite double-coating technology, a buffer layer is constructed using cerium oxide to actively stabilize lattice oxygen and suppress oxygen release, while a three-dimensional electronic superconducting network is constructed using reduced graphene oxide, thereby synergistically improving the stability and kinetic properties of the material.
It significantly improves the thermal stability and cycle life of the material, enhances electronic conductivity, and reduces charge transfer impedance, achieving a synergistic enhancement of the stability and kinetic performance of high-nickel cathode materials.
Smart Images
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