浸渍模压与CVD复合工艺制备质子交换膜燃料电池用炭纸  

Carbon paper fabricated by molding and CVD process for PEMFC application

作　　者：常新[1] 黄启忠[1] 王秀飞[1] 肖勇[1] 杨鑫[1] 谢志勇[1] 张敏[1] 樊哲琼[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2009年第3期184-188,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA11A136);国家重点基础研究发展规划(973计划)资助项目(2006CB600901)

摘　　要：以干法成形技术制备的炭纤维坯体为预制体,酚醛树脂作粘结剂,通过浸渍、模压、炭化、CVD和石墨化制备质子交换膜燃料电池用炭纸。借助扫描电镜(SEM)观察炭纸表面形貌,用四探针法测试炭纸面电阻。研究结果表明:浸渍模压与CVD复合工艺在炭纤维表面形成连续均匀的热解炭层,增强纤维与基体的结合,减少裂纹缺陷,提高炭纸的导电性能;炭纸横向和纵向的面电阻分别为0.34Ω和0.37Ω,小于日本东丽炭纸的面电阻0.43Ω和0.70Ω。Polyacrylonitrile （PAN） based carbon fiber paper prefab compact was prepared at first by nonwoven fabrics method, And then carbon paper being used for preparing PEMFC （proton exchange membrane fuel cell） was fabricated by impregnating the prefab compact with phenolic resin, molding, carbonization, chemical vapor deposition （CVD） and graphitization procesess. The microstructures of carbon paper and the prefabricate were observed by SEM, and the electrical property was measured by the four-probe technique. The results indicate that pyrocarbon on the carbon fiber surface is continuous and uniform, which enhances the combination of carbon fibers and matrix, eliminates the crack flaws, and moreover improves the in-plane electrical resistance, which are 0.34Ω and 0.37Ω respectively in different direction, while those of Toray carbon paper of Japan are 0.42Ω and 0.70Ω correspondingly.

关 键 词：质子交换膜燃料电池 化学气相沉积 浸渍模压 面电阻 

分 类 号：TB332[一般工业技术—材料科学与工程]