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| Study on Improving the Uniformity of Carbon Fiber Paper for Proton Exchange Membrane Fuel Cell |
| Received:June 08, 2023 |
| DOI：10.11980/j.issn.0254-508X.2023.11.005 |
| Key Words:carbon fiber surface modification air oxidation dispersion uniformity |
| Fund Project:国家自然科学基金（41576111）；大连市重点科技研发计划（2023YF14GX021）；中国石油化工股份有限公司合同项目（320131-3）。 |
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| Abstract:Using polyacrylonitrile-based short carbon fiber as the raw material， the carbon fiber paper（referred to as carbon paper） base paper was prepared by wet forming process， the surface morphology， chemical structure and element valence of carbon fiber under different treatment conditions were characterized by modern analytical instruments. The dispersion of carbon fiber under different treatment conditions and the uniformity of the prepared carbon paper base paper were observed， and the optimum condition for high-temperature air oxidation treatment was studied. The results showed that after high-temperature air oxidation treatment， the content of oxygen element and oxygen-containing functional group on the surface of carbon fiber significantly increased， the dispersion of carbon fiber in water was obviously enhanced， and the uniformity of the carbon paper base paper was significantly improved with the variation coefficient of resistivity decreased from 0.22 to 0.05. The best treatment condition of high-temperature air oxidation modified carbon fiber was at 500 °C for 2 h. |
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