A re-doped hydrophobic composite carbon fiber paper-based electrode material and preparation method thereof
By coating the acid-doped conductive polymer on the cellulose and introducing perfluorosulfonic acid, the perfluorosulfonic acid-doped conductive polymer/cellulose composite fiber is formed and blended with carbon fiber, the problem of insufficient conductivity and hydrophobicity of carbon fiber paper is solved, and higher conductivity and hydrophobicity are achieved.
CN115360372BActive Publication Date: 2025-03-25ZHEJIANG UNIV OF SCI & TECH
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Patent Information
- Application Number
- CN202210949851.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-09
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2042-08-09
AI Technical Summary
Technical Problem
Carbon fiber paper lacks electrical conductivity and hydrophobicity in fuel cells, and cannot meet the needs of high performance and stability.
Method used
The acid-doped conductive polymer is coated on cellulose by in-situ chemical oxidation polymerization, and then the perfluorosulfonic acid is introduced by the dedoping-re-doping method to form perfluorosulfonic acid-doped conductive polymer/cellulose composite fibers, and blended with carbon fibers, and molded by a carbon paper wet preparation process.
Benefits of technology
The conductivity and hydrophobicity of carbon fiber paper are improved, and more conductive paths are formed to meet the requirements of fuel cells for gas diffusion layers.
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Abstract
The invention discloses a method for preparing a re-doped hydrophobic composite carbon fiber paper-based electrode material, comprising: coating a layer of acid-doped conductive polymer on cellulose by in-situ chemical oxidation polymerization to form a conductive polymer / cellulose composite fiber; introducing perfluorosulfonic acid on the conductive polymer / cellulose composite fiber by a dedoping-redoping method to obtain a perfluorosulfonic acid-doped conductive polymer / cellulose composite fiber; blending the perfluorosulfonic acid-doped conductive polymer / cellulose composite fiber with carbon fiber, forming the fiber by a carbon paper wet preparation process, and obtaining an in-situ coated cellulose composite carbon fiber paper-based electrode material by drying and hot pressing. The method is to modify the plant fiber in the traditional carbon fiber paper preparation process, introduce perfluorosulfonic acid-doped conductive polymer / cellulose composite fiber that enhances the conductive network and hydrophobicity into the carbon fiber paper, and prepare a carbon fiber paper with good hydrophobicity and low resistivity.
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