PEMFC用气体扩散层中微孔层的干法制备  

Dry-layer preparation of micro-porous layer for PEMFC

作　　者：徐海峰[1] 陈剑[1] 王晓丽[1] 衣宝廉[1] 张华民[1] 

机构地区：[1]中国科学院大连化学物理研究所燃料电池工程中心

出　　处：《电源技术》2007年第1期57-59,共3页Chinese Journal of Power Sources

基　　金：国家自然科学基金重点资助项目(50236010)

摘　　要：比较了用干法和湿法制备的微孔层(MPL)对质子交换膜燃料电池(PEMFC)输出性能的影响。结果表明干法MPL具有较湿法MPL更优的“水管理”功能。对基于干法MPL和湿法MPL的气体扩散层(GDL)分别进行了表征,包括扫描电子显微镜法(SEM)、透气率以及表面接触角。表征结果支持上述实验结论。干法MPL中PTFE质量百分含量的最优值为30%。The performance of the PEMFC single cells with dry-layer MPL and wet-layer MPL were investigated. The experiments indicate that the transport of liquid watedgas in GDL with dry-layer MPL is much better than that with wet-layer MPL, especially when the PEMFC is performed at high current densities. The surface morphology, hydrophobic characteristic of the surface and gas permeability of the GDLs with dry-layer MPL and wet-layer MPL were characterized, The results show good agreement with the experimental observations. The optimal value of PTFE content in dry-layer MPL is 30%.

关 键 词：微孔层 干法制备 湿法制备 气体扩散层 质子交换膜燃料电池 

分 类 号：TM911.48[电气工程—电力电子与电力传动]