High-compaction lithium manganese iron phosphate positive electrode material and preparation method thereof

CN119627076APending Publication Date: 2025-03-14锂源(深圳)科学研究有限公司 +1
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202411792891.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-08
Publication Date
2025-03-14

AI Technical Summary

Technical Problem

The compaction and electrical properties of the existing lithium manganese iron phosphate cathode material cannot meet the needs, and the existing preparation methods are complex and costly, making it difficult to ensure the uniformity of the material.

Method used

A high-pressure lithium manganese ferrophosphate positive electrode material is prepared by sand grinding, spray drying and sintering processes. This method generates reducing gas by small particle size precursors, assists in reducing metal ions, and uses a carbon source to form a uniform and dense carbon cladding layer to improve conductivity.

Benefits of technology

It realizes high compaction and excellent electrical properties of the cathode material, with a compaction degree of 2.4g/cc and a discharge capacity of 0.1C to reach 150mAh/g or above. At the same time, it reduces process costs and production complexity, making it suitable for large-scale applications.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119627076A_ABST
    Figure CN119627076A_ABST
Patent Text Reader

Abstract

The invention discloses a high-compaction lithium manganese iron phosphate positive electrode material and a preparation method thereof. The high-compaction lithium manganese iron phosphate positive electrode material comprises a large-particle-size bimetallic salt precursor which does not generate gas or generates less gas, a small-particle-size bimetallic salt precursor which generates large gas, a lithium source, a phosphorus source and a carbon source, the preparation method comprises the following steps: mixing the large-particle-size bimetallic salt precursor and the small-particle-size bimetallic salt precursor according to a mass ratio, mixing with a lithium source, a phosphorus source, a carbon source and a doped metal source, sanding, spraying, and sintering to obtain the lithium manganese iron phosphate positive electrode material. The compaction of the lithium manganese iron phosphate positive electrode material can reach about 2.4 g / cc, meanwhile, the 0.1 C discharge capacity of the lithium manganese iron phosphate positive electrode material can reach more than 150mAh / g, and the lithium manganese iron phosphate positive electrode material not only has high compaction, but also has excellent electrical properties.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Preparation method and application of lithium manganese iron phosphate material

    CN117658095A