复合正极材料及其制备方法和二次电池
By coating a fast-ion conductor onto the positive electrode substrate of a lithium-ion battery and adding carbon material into its pores, the problem of reduced electronic conductivity was solved, achieving efficient lithium-ion diffusion and low-resistance battery performance, thus extending battery life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NATIONAL INSTITUTE OF GUANGDONG ADVANCED ENERGY STORAGE CO LTD
- Filing Date
- 2024-06-26
- Publication Date
- 2026-07-17
AI Technical Summary
The coating of existing fast ion conductor materials on the surface of the positive electrode of lithium-ion batteries leads to a decrease in electronic conductivity, and the direct coating of carbon materials increases resistance, affecting battery performance.
A fast ion conductor is coated onto a positive electrode substrate, and carbon material is added into its pores. A porous fast ion conductor coating layer is formed through heat treatment and hydrothermal reaction. The carbon material is located in the pores to form an electron conduction path and reduce contact with the positive electrode substrate.
It improves the diffusion rate of lithium ions, reduces the internal resistance of the battery, extends the cycle life of the battery, and maintains good electrochemical performance.
Smart Images
Figure CN118630182B_ABST