Graded porous carbon material and preparation method thereof

The hierarchical porous carbon material was prepared by thermoplastic phenolic resin modified with an organic iron source, which solved the problems of low graphitization and poor conductivity of porous carbon materials in lithium-ion batteries, formed a micro-mesoporous structure, optimized the pore size distribution, and improved the silicon loading efficiency and battery performance.

CN120646828APending Publication Date: 2025-09-16ZHEJIANG XINAN CHEM IND GRP CO LTD
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Patent Information

Application Number
CN202510892261.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

Existing porous carbon materials have problems in lithium-ion batteries, such as low graphitization degree, poor conductivity, single pore size distribution, large pore resistance, and low silicon loading efficiency, which limit their application in high-energy-density lithium-ion batteries.

Method used

Using thermoplastic phenolic resin modified with an organic iron source as raw material, a hierarchical porous carbon material is formed through the curing, carbonization and activation processes. Iron oxide is used as a catalyst and template to form a micro-mesoporous structure, improve the degree of graphitization and conductivity, and optimize the pore size distribution.

Benefits of technology

It significantly improves the graphitization degree and conductivity of porous carbon materials, provides transport pores that match the deposition pore volume, reduces pore resistance, improves silicon loading efficiency, and enhances the electrochemical performance of lithium-ion batteries.

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Abstract

The invention relates to the field of energy, in particular to a graded porous carbon material and a preparation method thereof.The method comprises the steps that thermoplastic phenolic resin is prepared, and the thermoplastic phenolic resin is low-molecular-weight resole; curing the thermoplastic phenolic resin to obtain thermosetting phenolic resin; carbonizing the thermosetting phenolic resin to obtain a carbide; and activating the carbide to obtain the graded porous carbon. According to the method, the micro-mesoporous graded carbon is formed, conveying holes matched with the deposition pore volume are provided, the pore channel resistance is reduced, and the silicon loading efficiency is improved; the graphitization degree is obviously improved, so that the conductivity of pyrolytic carbon is improved.
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