Lithium-rich lithium iron phosphate composite material, preparation method thereof, positive plate and lithium ion battery
By coating the outer surface of lithium iron phosphate material with a composite layer of alumina and carbon, the problems of material conductivity and structural stability were solved, resulting in a lithium-ion battery with high energy density and good cycle performance.
Patent Information
- Application Number
- CN202610737693.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-26
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium iron ferrite materials suffer from low intrinsic conductivity, poor structural stability, and high residual alkali content on the surface, resulting in poor processing performance and limited release capacity.
A composite coating layer of alumina and carbon materials is used to coat the outer surface of the lithium iron ferrite core. A dense coating layer is formed by atomic layer deposition technology. The thickness and mass ratio of the coating layer are controlled. Combined with an inorganic carbon source, side reactions are avoided during high-temperature sintering, thereby improving the electrical conductivity and structural stability of the material.
It significantly improves the electrical conductivity and structural stability of lithium iron phosphate composite materials, reduces the residual alkali content on the surface, and enhances the energy density and cycle performance of the battery.
Smart Images
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