PEM FC流场结构对电池性能的影响  

Effects of flow-field structure on PEMFC performance

作　　者：李云峰[1,2] 才英华[1,2] 张华民[1] 衣宝廉[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 [2]中国科学院研究生院,北京100039

出　　处：《电源技术》2005年第5期278-281,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金重点资助项目(50236010);国家重点基础规划项目(G2000026410);辽宁省科学技术基金(无编号)

摘　　要：在PEMFC中,阴极的流场对电池性能有着重大的影响。好的阴极流场能更有效的排出电池内部生成水并大大提高电池的输出功率。在原有流场的基础上设计出具有不同特点的新型流场,再利用H2-空气PEMFC单电池进行实验比较各种流场的性能,同时对直通道和蛇型流场分别在雷诺数Re和进出口压差进行分析。比较压差与电池排水的关系,得出较高压差具有较好的电池性能。The cathode flow-field in PEMFC affects the fuel cell performance greatly. Good flow-field can drain the water product in fuel cell and improve cell performance effectively. In this paper, the Re number and pressure difference between flow-field inlet and outlet were analyzed and investigated. At the same time, We designed two kinds of flow-field type to compare the performance of parallel and serpentine flow field when they were used as 128cm2 H2-air PEMFC cathode flow field. The relationship of different flow-field pressure difference between inlet and outlet on cell was investigated, and it concluded that higher pressure difference brings better performance.

关 键 词：PEMFC 流场 电池性能 

分 类 号：TM911.4[电气工程—电力电子与电力传动]