Carbon fluoride positive electrode material, preparation method and application thereof

By preparing fluorinated Ketjenblack materials with a three-dimensional porous network structure, the problem of electrode structure damage caused by dense coverage of lithium battery discharge products was solved, and high stability and high specific energy lithium battery performance were achieved.

CN122800613APending Publication Date: 2026-09-22XIAMEN ZHONGKE SHIFU TECH CO LTD
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Patent Information

Application Number
CN202610646455.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-12
Publication Date
2026-09-22

AI Technical Summary

Technical Problem

In existing lithium-ion batteries, the fluorinated graphite system produces discharge products with a dense structure that covers the surface of the active material during discharge, leading to electrode structure damage and performance degradation, especially insufficient rate performance at low temperatures.

Method used

Fluorinated Ketjenblack material with a three-dimensional porous network structure is prepared by indirect gas-phase fluorination to form a fluorinated carbon cathode material with cross-linked nano-carbon particles. This process controls the spatial distribution and growth direction of discharge products and constructs an ion channel network.

Benefits of technology

It achieves high stability and high specific energy lithium battery performance, with the discharge products dispersed to buffer volume expansion stress, maintain electrode structural integrity, and ensure continuous ion transport path, exhibiting high specific capacity and high voltage plateau.

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Abstract

The application discloses a fluorinated carbon positive electrode material, which is fluorinated ketchen black and is composed of a three-dimensional porous network formed by cross-linking of nano carbon particles. The application also discloses a preparation method of the fluorinated carbon positive electrode material, wherein ketchen black is used as a carbon precursor, and the fluorinated carbon positive electrode material is prepared by an indirect gas phase fluorination method. The application further discloses application of the fluorinated carbon positive electrode material or the positive electrode material prepared by the preparation method of the fluorinated carbon positive electrode material in a lithium battery. The porous network formed by cross-linking of the nano carbon particles of the fluorinated ketchen black is used for restraining and guiding the spatial distribution of discharge products, so that the electrochemical performance of the lithium battery is improved.
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