Battery monomer, negative electrode material, preparation method of negative electrode material, battery device and power utilization device

By optimizing the particle structure of the negative electrode material, using primary particles of specific size and porous carbon materials, combined with two-dimensional or one-dimensional carbon materials, the problem of insufficient energy density and cycle performance of battery cells was solved, achieving high energy density and stable lithium-ion transport.

CN122000312APending Publication Date: 2026-05-08CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Filing Date
2024-11-08
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing battery cells have shortcomings in terms of energy density, cycle performance, and kinetic performance, especially the high impedance caused by the long lithium-ion transport path and the structural instability caused by silicon expansion.

Method used

By using primary particles of specific size and porous carbon materials, combined with two-dimensional or one-dimensional carbon materials, the secondary particle structure is optimized, the lithium-ion transport distance is shortened, silicon expansion space is provided, and the conductivity and structural stability of the material are improved.

Benefits of technology

It improves the energy density, kinetic performance, and cycle stability of individual battery cells, reduces internal resistance, and enhances mechanical strength.

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Abstract

The invention provides a battery monomer, a negative electrode material, a method for preparing the negative electrode material, a battery device and a power utilization device. The battery monomer comprises a negative electrode plate, the negative electrode plate comprises a negative electrode material, the negative electrode material comprises a negative electrode active material, the negative electrode active material comprises secondary particles, and the secondary particles comprise primary particles and a one-dimensional carbon material and / or a two-dimensional carbon material; the volume average particle size Dv50 of the secondary particles is 7-23 [mu] m; the volume average particle size Dv50 of the primary particles is 0.5-5 [mu] m; the primary particles comprise a porous carbon material, and silicon particles are distributed on the surface and / or in pore channels of the porous carbon material. The battery monomer disclosed by the invention is high in energy density, good in dynamic performance and stable in cycle performance.
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