Analysis of degradation in PEMFC caused by cell reversal during air starvation
- 作者：Akira Taniguchi ; Tomoki Akita ; Kazuaki Yasuda ; Yoshinori Miyazaki
- 关键词：PEMFC ; Fuel cell ; Air starvation ; Cell reversal ; Electrocatalyst
- 刊名：International Journal of Hydrogen Energy
- 出版年：2008
- 期刊代码：42_03603199
- 类别：ch
- 出版时间：May 2008
- 卷：33
- 期：9
- 页码：2323-2329
- 文件大小：1152 K
摘要
The damage caused by cell reversal during proton exchange membrane fuel cells (PEMFCs) operation with air starvation was investigated by a single-cell experiment. Samples from degraded membrane–electrode assemblies (MEAs) were characterized. The loss of electrochemical surface area of the cathode platinum was detected by in situ cyclic voltammetry, and platinum sintering was detected by transmission electron microscopy (TEM) analysis. Degradation at the anode was not detected in the chemical analysis of the anode catalyst layer of MEA samples by energy dispersive X-ray analysis (EDX) and TEM. An obvious decrease in the performance of PEMFC was observed in a sample degraded by cell reversal for 120 min.