Lithium ion battery cathode material, preparation method and application thereof
By designing a core-shell structure with a manganese-rich surface and an iron-rich bulk in lithium manganese iron phosphate materials, and by using a spray method to precisely control the component distribution and combining doping and carbon coating, the contradiction between high voltage and long cycle stability of lithium manganese iron phosphate materials has been resolved, achieving a synergistic improvement in high energy density and excellent cycle performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAOGAN CORNEX NEW ENERGY INNOVATION TECHNOLOGY CO LTD
- Filing Date
- 2026-05-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium manganese iron phosphate cathode materials present a contradiction in terms of improving operating voltage and cycle stability. Existing improvement schemes have failed to effectively coordinate and harmonize the electrochemical properties of manganese and iron, resulting in insufficient release of high voltage potential or insufficient cycle life.
A core-shell structured lithium manganese iron phosphate material is designed, with a higher manganese-to-iron ratio on the surface region than in the bulk phase. A manganese-rich surface layer and an iron-rich bulk phase are formed by precisely controlling a spray method. Combined with metal ion doping and carbon coating, the high-manganese region dominates the high voltage in the electrochemical reaction, while the iron-rich bulk phase provides structural stability.
It significantly improves the operating voltage and cycle stability of the material, achieving a balance between high energy density and long cycle life, and optimizes electrochemical performance.
Smart Images
Figure CN122417840A_ABST