A lithium manganese iron phosphate material and a preparation method thereof
By employing a multi-stage complexation co-precipitation process and carbon source sintering technology, the problem of uniform distribution of manganese iron elements in lithium iron phosphate materials was solved, resulting in high-voltage, high-capacity, and excellent rate performance lithium manganese iron phosphate materials, which significantly improves the energy density and cycle stability of batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 湖南泓原新能源科技有限公司
- Filing Date
- 2026-05-07
- Publication Date
- 2026-07-17
AI Technical Summary
The uniform distribution of manganese and iron elements in existing lithium iron phosphate materials is difficult, leading to micro-phase separation and the formation of nanoscale iron-rich and manganese-rich phase regions. This results in reduced energy efficiency and structural failure, making it difficult to meet the requirements for high energy density and long cycle life.
A multi-stage complexation coprecipitation process is adopted, which utilizes the stepwise complexation effect of different complexing agents at different temperatures and pH to achieve molecular-level uniform mixing of manganese and iron ions in the liquid phase. The manganese and iron ions are then fixed in the crystal lattice by carbon source and sintering process to suppress phase separation.
Atomic-level uniformity of manganese and iron elements was achieved, and the material exhibited a single voltage plateau during charge and discharge, which improved voltage efficiency and energy density and extended cycle life.
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