质子交换膜燃料电池内水传递影响因素分析  

A parametric study on water transfer in a PEMFC

作　　者：才英华[1] 胡军[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》2005年第10期659-662,697,共5页Chinese Journal of Power Sources

基　　金：国家自然科学基金重点资助项目(No.50236010);国家重点基础研究发展规划项目(No.G2000026410);辽宁省科学技术基金(无编号)

摘　　要：通过大面积质子交换膜燃料电池(PEMFC)的水平衡实验研究,考察了不同操作条件,如电池阴极增湿温度、电池操作温度及阴阳极压差对水在阴阳极间迁移行为及对电池输出性能的影响。实验结果表明,提高电池阴极增湿温度,促进了水向阳极的扩散,在一定程度上可提高电池的性能,但同时增大了电池的水淹程度;提高电池操作温度促进反应生成水向阳极的迁移并提高了电池性能;减小阳极压力以增大阴阳极压差可促进水向阳极迁移,但压差对水的迁移行为影响不大。A series water balance experiments have been performed on a PEMFC to study water transfer between anode and cathode and the cell performance under different operating conditions, including different cathode humidity temperature, cell temperature, and operating pressure difference between anode and cathode. The results show that water back diffusion and performance of the cell increase with increasing humidity temperature, though the cell is easy of “flooding”. Higher cell temperature is beneficial to back diffusion and hence increases cell output. The difference of pressure between anode and cathode has a little influence on water transfer.

关 键 词：质子交换膜燃料电池 水平衡 水传递 

分 类 号：TM911.4[电气工程—电力电子与电力传动]