A silk-based cobalt ferrite / carbon fiber composite material and a preparation method thereof

By preparing silk-based cobalt ferrite/carbon fiber composite materials, the problems of insufficient electrochemical activity and uneven metal oxide loading in biomass carbon materials were solved, achieving high conductivity and stability and improving electrochemical performance.

CN122314871APending Publication Date: 2026-06-30BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Filing Date
2026-02-15
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing technologies, biomass carbon materials have insufficient electrochemical active sites, and the transition metal oxides are unevenly loaded on the carbon fiber surface and have unstable structures, resulting in poor conductivity and volume expansion problems.

Method used

Using silk as raw material, silk-based cobalt ferrite/carbon fiber composite material was prepared by high-temperature carbonization combined with hydrothermal method. After degumming and carbonization, the silk formed a three-dimensional network structure of carbon fiber. Cobalt ferrite nanoparticles grew uniformly in situ on the surface of carbon fiber, constructing a highly conductive skeleton and providing highly active sites.

Benefits of technology

High conductivity and stability of silk-based cobalt ferrite/carbon fiber composite materials were achieved, improving electrochemical energy storage performance, and the process was cost-effective and environmentally friendly.

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Abstract

This invention relates to a silk-based cobalt ferrite / carbon fiber composite material, its preparation method, and its application. The preparation method involves using silkworm cocoons as raw material, degumming them by boiling in a sodium bicarbonate solution, drying them, pre-oxidizing them in air, and then carbonizing them at high temperature in a nitrogen atmosphere to obtain silk-based carbon fibers. The prepared silk-based carbon fibers are then impregnated with a solution containing Fe. 3+ and Co 2+ In a mixed solution, the pH value was adjusted, and the reaction was carried out at high temperature to allow cobalt ferrite to grow in situ on the surface of carbon fibers. After washing and drying, a silk-based cobalt ferrite / carbon fiber composite material was obtained. The silk-derived carbon fibers of this invention retain the natural fiber network structure and have good electrical conductivity. The cobalt ferrite particles grown in situ via hydrothermal method are uniformly distributed on the carbon fiber surface, effectively increasing the reactive sites and improving the insufficient electrochemical performance of pure carbon materials.
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