Preparation method of coal-based porous graphene composite ternary material

By preparing a composite of coal-based porous graphene and ternary materials, the problems of insufficient energy density of coal-based porous graphene cathode materials and short cycle life of ternary materials were solved, realizing a high specific energy hybrid capacitor cathode material, and improving the performance and economic benefits of hybrid capacitors.

CN119637858BActive Publication Date: 2026-06-30CHINA DATANG GRP TECH INNOVATION CO LTD +1
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Patent Information

Application Number
CN202411685631.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-23
Publication Date
2026-06-30
Estimated Expiration
2044-11-23

AI Technical Summary

Technical Problem

Existing coal-based porous graphene cathode materials are insufficient in terms of energy density, while ternary materials, when used as cathodes in hybrid capacitors, have short cycle life and high cost, making it difficult to meet the requirements of high energy density and high stability.

Method used

Using low-cost coal as a porous carbon precursor, coal-based porous graphene materials were prepared by carbonization followed by activation. These materials were then combined with ternary materials. Potassium-based activators were used to promote the synergistic development of pores and graphite microcrystalline structures. Combined with the surface synergistic energy storage mechanism, a high-energy-density hybrid capacitor cathode composite material was prepared.

Benefits of technology

It broadens the application fields of coal, improves the performance of energy storage materials, and provides new ideas for the development of energy storage technologies such as hybrid capacitors, with significant economic value and broad application prospects.

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Abstract

A method for preparing a coal-based porous graphene composite ternary material belongs to the field of materials preparation technology. The method is as follows: raw material refinement; carbonization of coal raw materials; mixing of activator and product; activation of the mixture; cleaning and drying of the activated product to obtain coal-based porous graphene material; mixing of ternary metal salts; mixing of the mixture with a lithium source to obtain a precursor material; sintering of the precursor material; cleaning and drying of the product to obtain the ternary material; composite material preparation: This invention uses low-cost coal as a porous carbon precursor, and effectively prepares coal-based porous graphene material through a method of carbonization followed by activation, which is suitable for mass production; the potassium-based activator simplifies the process and simultaneously catalyzes the graphitization process, promoting the synergistic development of pores and graphite microcrystalline structure; the coal-based porous graphene is combined with the ternary material, and a high-specific-energy hybrid capacitor cathode composite material is prepared based on the bulk surface synergistic energy storage mechanism.
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