Preparation method of low-cost amorphous carbon coated silicon monoxide composite material

Amorphous carbon-coated silicon suboxide composite material was prepared by high-energy ball milling and high-temperature carbonization, which solved the shortcomings of lithium-ion battery anode materials in terms of high capacity and long cycle life, and achieved low-cost performance improvement.

CN122291431APending Publication Date: 2026-06-26XINJIANG UNIVERSITY
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Patent Information

Application Number
CN202411909653.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing lithium-ion battery anode materials have shortcomings in terms of high capacity and long cycle life, and carbon coating technology is costly, making it difficult to achieve efficient improvement in battery performance.

Method used

The size of silicon suboxide material was reduced by high-energy ball milling, and amorphous carbon-coated silicon suboxide composite material was prepared by introducing graphene and trimesic acid in stages and combining it with high-temperature carbonization method, which can be used as a negative electrode material for lithium-ion batteries.

Benefits of technology

The prepared amorphous carbon-coated silicon suboxide composite material exhibits excellent electrochemical performance, improving the capacity and cycle life of lithium-ion batteries while reducing production costs.

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Abstract

The invention relates to a preparation method of a low-cost amorphous carbon coated silicon monoxide composite material. The size of the silicon oxide material is reduced by adopting a high-energy ball milling process, then graphene and trimesic acid are introduced in stages, the amorphous carbon-coated silicon oxide material is obtained in a high-temperature carbonization mode, the amorphous carbon-coated silicon oxide material is prepared into an electrode to serve as a lithium ion battery negative electrode material, and excellent electrochemical performance is shown. The invention establishes a method for preparing the carbon-coated silicon monoxide negative electrode material by using amorphous carbon, and realizes high value-added utilization of the silicon monoxide material, so that the method has important research significance.
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