期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 156, 期 9, 页码 B1078-B1084出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3169514
关键词
carbon; catalysts; high-frequency effects; ionic conductivity; proton exchange membrane fuel cells
Analytical techniques were investigated for examining the influence of the ionomer network structure on proton transport in the catalyst layers of a polymer electrolyte fuel cell. Two samples were made with and without a pseudocatalyst layer (PCL) consisting of a carbon black support and an ionomer between two membranes. The overall resistance of the samples was evaluated with a hydrogen pump technique. The difference in resistance between them was mainly due to the proton-transport resistance of the PCL. Another technique of subtracting high frequency resistance from the overall resistance was also examined. Almost the same characteristics were obtained with both techniques. Using the former technique, the effective proton conductivity of PCLs with different carbon supports was investigated. The effective proton conductivities differed. An analysis of the difference revealed the following two possible causes. One is that the Bruggeman factor of the samples might have been affected by the state of ionomer coverage. Another is that the proton conductivities of the ionomer as bulk differed, which might have been due to a difference in water content attributable to the carbon supports.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据