Silicon-carbon composite material, preparation method and battery
By embedding graphene and filling nanosilicon in porous carbon and covering amorphous carbon and organic lithium salts on the surface, a silicon-carbon composite material was prepared, which solved the shortcomings of existing silicon-carbon materials in terms of rate performance and fast charging performance, and achieved higher battery performance and lower expansion.
CN119764403AActive Publication Date: 2025-04-04SVOLT ENERGY TECHNOLOGY CO LTD
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Patent Information
- Application Number
- CN202411965866.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2044-12-30
AI Technical Summary
Technical Problem
The existing silicon carbon materials cannot achieve ideal conditions in terms of rate performance and fast charging performance, affecting the working performance and energy storage capabilities of the battery.
Method used
By embedding graphene in porous carbon and filling nanosilicon on its surface, a core is formed; at the same time, amorphous carbon and organic lithium salt are coated on the surface of the core to form a cladding layer to prepare a silicon-carbon composite material.
Benefits of technology
The electronic conductivity and cycling performance of silicon-carbon composite materials are improved, the rate performance and fast charging performance of the battery are enhanced, and the expansion degree is reduced.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a silicon-carbon composite material, a preparation method and a battery. The silicon-carbon composite material comprises an inner core, the inner core comprises a silicon-carbon material, the silicon-carbon material comprises porous carbon, graphene is embedded into at least part of the porous carbon, and at least part of the porous carbon is filled with nanometer silicon; the coating layer coats at least part of the surface of the inner core, and the coating layer comprises amorphous carbon. The graphene can improve the electronic conductivity of the inner core, and meanwhile, the graphene is doped in the silicon-carbon material, so that the graphene can be tightly combined with the silicon material, the problem of growth of silicon grains is effectively avoided, the expansion degree of the silicon-carbon composite material is reduced, and the cycle performance of the battery is improved.
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