Lithium manganese iron phosphate positive electrode material and preparation method thereof, positive electrode plate and lithium ion battery
By coating the surface of the lithium manganese iron phosphate core with a lithium iron phosphate shell, the problem of poor high-temperature storage performance of lithium manganese iron phosphate material is solved, achieving high-capacity and high-temperature stable lithium-ion battery performance.
Patent Information
- Application Number
- CN202511350367.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2045-09-22
AI Technical Summary
Lithium manganese iron phosphate materials have poor high-temperature storage performance. After nano-sizing, the small particle size of the material leads to increased electrolyte erosion, increased Mn3+ disproportionation reaction, consumption of active lithium ions, and affects high-temperature storage performance.
Using lithium iron phosphate as the coating layer, it is uniformly coated on the surface of lithium manganese iron phosphate core through in-situ precipitation technology, which reduces electrolyte contact, reduces Mn3+ disproportionation reaction, and improves high-temperature cycle performance and storage performance.
It effectively isolates the electrolyte from corroding the lithium manganese iron phosphate core, reduces the Mn3+ disproportionation reaction, improves the high-temperature storage performance and capacity performance of the material, and achieves high capacity and high-temperature stability.