A lithium-rich lithium-iron-phosphate composite material, a preparation method and applications thereof
By constructing a multi-layer coating structure on the surface of lithium iron phosphate material, the problems of poor conductivity and insufficient air stability are solved, enabling efficient application of the material and improving the energy density and cycle stability of lithium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NINGBO RUNNING NEW ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2026-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
Lithium iron oxide materials have problems such as poor conductivity, insufficient air stability, and complex conventional coating processes and non-dense coating layers in lithium-ion batteries, which affect their practical application in lithium-ion batteries.
The multilayer coating structure includes a lithium iron phosphate core, a metal oxide coating layer, a first carbon layer, and a second carbon layer. The metal oxide film is formed by co-precipitation, sol-gel or atomic layer deposition, and a dense carbon layer is constructed by liquid phase impregnation and chemical vapor deposition, forming a continuous and uniform multilayer coating.
It significantly improves the conductivity and stability of the material, simplifies the production process and reduces costs, solves the problems of material sensitivity and structural instability in air, and improves the energy density and cycle stability of lithium-ion batteries.
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Figure CN122417831A_ABST