A method for preparing a negative electrode material, a prepared negative electrode material and use thereof

By regulating the activation process of organic carbon sources and the coating of transition metal salts, microporous carbon materials and carbon nanotube structures were prepared as sodium-ion battery anode materials, solving the problems of insufficient specific capacity, rate performance and coulombic efficiency in the existing technology, and realizing the industrial application of high-efficiency sodium-ion battery anode materials.

CN122685066APending Publication Date: 2026-09-04CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202510252530.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-04
Publication Date
2026-09-04

AI Technical Summary

Technical Problem

Existing sodium-ion battery anode materials cannot simultaneously achieve high specific capacity, good rate performance, and high first-cycle coulombic efficiency, which limits the industrialization process of sodium-ion batteries.

Method used

Using organic carbon sources as raw materials, the pore size distribution is controlled through an activation process, and a composite carbon structure is coated in the presence of transition metal salts to prepare a negative electrode material with microporous carbon materials and carbon nanotubes.

Benefits of technology

It significantly improves the sodium storage capacity and first-cycle coulombic efficiency of sodium-ion battery anode materials, reduces production costs, and is suitable for large-scale industrial production.

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Abstract

The application provides a preparation method of a negative electrode material, a prepared negative electrode material and application thereof, and the preparation method comprises the following steps: (1) obtaining material A by treating an organic carbon source in the presence of an oxygen-containing atmosphere; (2) obtaining material B by activating the material A; (3) mixing the material B with a solution containing a transition metal salt, and then obtaining material C by drying; and (4) obtaining the negative electrode material by growing a heterogeneous carbon layer on the material C. The application also provides a negative electrode material and a sodium ion battery obtained by using the above preparation method. The preparation process of the negative electrode material uses an organic carbon source as a raw material, the pore size distribution of the organic carbon source is accurately shaped by controlling an activation process, and the porous carbon structure is coated with a composite carbon structure in the presence of a transition metal salt, so that the overall electrochemical performance of the negative electrode material is improved.
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