一种磷酸铁锂正极材料及其制备方法
By forming a boron- and calcium-co-doped carbon layer on the surface of lithium iron phosphate, the problems of reduced tap density and high raw material cost after coating the surface of lithium iron phosphate with a carbon layer are solved, thereby improving the conductivity and tap density, and enhancing the electrochemical performance and battery life of lithium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 内蒙古中合新材料有限公司
- Filing Date
- 2026-01-06
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies that coat lithium iron phosphate with a carbon layer improve conductivity but reduce tap density and have high raw material costs limit their application in lithium-ion batteries.
A lithium iron phosphate precursor was prepared by calcining a mixture of lithium carbonate, iron phosphate, grinding media, and additives. A carbon layer was formed on the surface of the lithium iron phosphate precursor by combining a mixed slurry of chitosan, boric acid, calcium gluconate, and glycerol solution. A three-dimensional conductive network was formed by boron and calcium co-doping, which optimized the crystal structure and improved the conductivity and tap density.
It significantly improves the electrochemical performance and cycle life of lithium iron phosphate cathode materials, reduces raw material costs, and at the same time increases the driving range and energy density of lithium-ion batteries.
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