Preparation method of phenolic resin / alginate composite porous carbon for supercapacitor electrode materials

By using a method for preparing phenolic resin/alginate composite porous carbon, the problems of high capacity and cycle stability of supercapacitor electrode materials have been solved. This method enables the preparation of supercapacitor electrode materials with high specific capacitance and good cycle performance, and features a low-cost and high-efficiency preparation process.

CN118645379BActive Publication Date: 2026-07-17QINGDAO UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO UNIV OF TECH
Filing Date
2024-07-12
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies make it difficult to prepare porous carbon materials with high capacity, excellent rate performance, and cycle stability for use as electrode materials in supercapacitors.

Method used

A method for preparing phenolic resin/alginate composite porous carbon was adopted. By mixing resorcinol, hexamethylenetetramine and distilled water, a surfactant and a manganese source were added to form a phenolic resin solution containing metal ions. The solution was then crosslinked with an alginate solution. After heating, carbonization and acid washing, a composite porous carbon material with a uniform microporous structure was prepared.

Benefits of technology

The prepared phenolic resin/alginate composite porous carbon material exhibits high specific capacitance, excellent rate performance and cycling performance, and the synthesis process is simple and inexpensive, making it suitable for large-scale preparation.

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Abstract

This invention discloses a method for preparing phenolic resin / alginate composite porous carbon for supercapacitor electrode materials, relating to the field of capacitor electrode material preparation technology. The method includes: firstly, preparing a phenolic resin solution containing metal ions under a high-salt environment; then mixing it with alginate and heating it to obtain a phenolic resin / alginate aerogel containing metal ions; drying the phenolic resin / alginate aerogel containing metal ions in a vacuum drying oven, followed by carbonization under a nitrogen atmosphere to obtain a phenolic resin / alginate composite carbon containing metal ions; immersing the phenolic resin / alginate composite carbon containing metal ions in acid, washing to remove residual metal ions, filtering, washing with water until neutral, and drying to obtain the phenolic resin / alginate composite porous carbon. This invention provides a simple method, and the prepared electrode material exhibits strong conductivity and excellent electrochemical performance.
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