Preparation method of high-conductivity lithium manganese iron phosphate material
CN122117876APending Publication Date: 2026-05-29湖南泓原新能源科技有限公司
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
- 2026-04-28
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
The insufficient conductivity of lithium manganese iron phosphate materials limits their high-rate charge and discharge capabilities.
Method used
Magnesium oxide and lanthanum oxide are used together as functional additives to form a core-shell-network structure with carbon nanotubes. Hydrofluoric acid and aluminum metaphosphate are used as regulating additives to optimize the lattice structure and interfacial resistance of the material, forming a continuous conductive network.
Benefits of technology
It significantly improves the conductivity and stability of lithium manganese iron phosphate materials, and enhances their high-rate charge and discharge capabilities.
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Smart Images
Figure REF-OBJ-1776657167750-000001
Abstract
The application relates to the technical field of lithium batteries, and specifically discloses a preparation method of a high-conductivity lithium manganese iron phosphate material, which comprises the following steps: (1) adding an iron source, a lithium source, a manganese source, a phosphorus source, a functional additive and carbon nanotubes into a glycol solution, mixing, drying and sintering to obtain a precursor; (2) ball-milling, screening and mixing the precursor obtained in the step (1) with a carbon source in deionized water, ultrasonic dispersing, drying and sintering to obtain the high-conductivity lithium manganese iron phosphate material; in the step (1), the functional additive is composed of magnesium oxide and lanthanum oxide at a weight ratio of (1-3):1, and the weight ratio of the functional additive and the carbon nanotubes is 1:(8-12). The application can effectively inhibit manganese dissolution and deposition, accelerate ion / electron transmission, significantly improve the conductivity of the lithium manganese iron phosphate material, and finally obtain the high-conductivity lithium manganese iron phosphate material with better quality.
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