一种三元正极材料的制备方法及所得三元正极材料、锂离子电池
By using nanoscale lithium salts as crystal nuclei in the synthesis of lithium nickel cobalt manganese oxide ternary cathode materials, a core-shell structured nano-intermediate is formed, which solves the problem of long lithium-ion diffusion paths and improves the electrochemical performance and cycle life of the material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 安徽得壹能源科技有限公司
- Filing Date
- 2024-12-17
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing synthesis process of lithium nickel cobalt manganese oxide ternary cathode materials, the lithium ion diffusion path is relatively long, which leads to crystal defects, lattice distortion and lattice stress, affecting electrochemical performance.
Using nanoscale non-water-soluble or slightly water-soluble lithium salts as crystal nuclei, a core-shell structured nano-intermediate is formed through a co-precipitation reaction, shortening the lithium-ion diffusion path, and then calcined with a lithium source to prepare ternary cathode materials.
The lattice stress and lattice defects of the ternary cathode material were improved, thereby enhancing the material's cycle stability and electrochemical performance. The capacity retention rate was over 90% after 50 cycles at 0.5C/1C and over 85% after 100 cycles.
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Figure CN119695136B_ABST