期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 10, 期 9, 页码 1261-1263出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.05.049
关键词
direct methanol fuel cell (DMFC); membrane electrode assembly (MEA); cathode; methanol crossover; mixed potential
资金
- 863 program of China [2007AA05Z150]
- Natural Science Foundation of China [50528404]
Methanol permeation is one of the key problems for direct methanol fuel cell (DMFC) applications. It is necessary to change the structure of the cathode of membrane electrode assembly (MEA). Therefore, a novel MEA with double-layered catalyst cathode was prepared in this paper. The double-layered catalyst consists of PtRu black as inner catalyst layer and Pt black as outer catalyst layer. The inner catalyst layer is prepared for oxidation of the methanol permeated from anode. The results indicate that this double-layered catalyst reduced the effects of methanol crossover and assimilated mixed potential losses. The performance of MEA with double-layered catalyst cathode was 52.2 MW cm(-2), which was a remarkable improvement compared with the performance of MEA with traditional cathode. The key factor responsible for the improved performance is the optimization of the electrode structure. (C) 2008 Elsevier B.V. All rights reserved.
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