A high energy density and high rate graphite negative electrode material and preparation method thereof

By mixing and carbonizing the phenolic resin, conductive agent with graphite precursor, and combining the coating and graphitization process of the binder, graphite negative electrode materials with high energy density and high rate performance are prepared, which solves the shortcomings of existing graphite negative electrode materials in terms of energy density and electrochemical properties.

CN119764444APending Publication Date: 2025-04-04INNER MONGOLIA GUOXUAN ZERO CARBON TECH CO LTD
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Patent Information

Application Number
CN202411712327.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-27
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

The energy density and electrochemical performance of existing graphite anode materials are unstable in practical applications, and the irreversible capacity loss during the first charging process is large, making it difficult to meet the needs of high energy density and high rate performance.

Method used

By mixing the phenolic resin, conductive agent with a graphite precursor, carbonizing, and coating and graphitizing with a binder, a graphite negative electrode material with good mechanical strength and compaction density was prepared.

Benefits of technology

The energy density and rate performance of graphite negative electrode materials are improved, their cycle stability and first-time Coulomb efficiency are enhanced, and the problem of unstable electrochemical performance is solved.

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Abstract

The present invention proposes a high-energy-density and high-rate graphite negative electrode material and a preparation method thereof, the preparation method comprising: after mixing a graphite precursor, a phenolic resin, a conductive agent and a solvent to form a slurry, spray drying to form microspheres, and then pre-carbonizing to obtain a carbonized microsphere material; after mixing the carbonized microsphere material with a binder, granulating, carbonizing, and graphitizing to obtain the graphite negative electrode material. The present invention proposes a high-energy-density and high-rate graphite negative electrode material and a preparation method thereof, by mixing a phenolic resin, a conductive agent and a graphite precursor, carbonizing, and then coating and graphitizing them with a binder, a graphite negative electrode material with good mechanical strength and compaction density is prepared, while improving the energy density of the graphite negative electrode material, ensuring a great enhancement of the rate performance.
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