一种类仙人球状结构的三元正极材料前驱体及其制备方法
By designing a cactus-like ternary cathode material precursor with lamellar edges and short, fine needle-like needles, and combining it with the high-temperature, high-pressure hydrolysis of urea to generate ammonium carbonate, the shortcomings of high-nickel NCM ternary cathode materials in cycle performance and rate performance were solved, and the stability and rate performance were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANTONG JINTONG ENERGY STORAGE POWER NEW MATERIAL CO LTD
- Filing Date
- 2024-03-04
- Publication Date
- 2026-07-17
AI Technical Summary
While the cycle performance of high-nickel NCM ternary cathode materials has been improved, the rate performance has not been improved, mainly because the gap between primary particles is too small, which leads to a decrease in lithium-ion transport speed.
The ternary cathode material precursor with a cactus-like spherical structure is designed. The spherical edges are plate-shaped with gaps between them, and the needles are short and thin needles distributed on and between the spherical edges. By controlling the temperature in the autoclave and introducing high-pressure water vapor, the hydrolysis of urea is accelerated to generate ammonium carbonate, forming fine needle-shaped carbonates, which improves lithium-ion transport.
This improved the cycle stability and rate performance of high-nickel NCM ternary cathode materials, achieving a good balance between cycle performance and rate performance.
Smart Images
Figure CN117964002B_ABST