期刊
JOURNAL OF CHEMICAL SCIENCES
卷 124, 期 2, 页码 529-536出版社
INDIAN ACAD SCIENCES
DOI: 10.1007/s12039-011-0211-3
关键词
Nafion SiO2 composite; nafion-MZP composite; nafion-1135; fluoride-ion-emission rate; gas-crossover; polymer electrolyte fuel cell
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi
PEFCs employing Nafion-silica (Nafion-SiO2) and Nafion-mesoporous zirconium phosphate (Nafion-MZP) composite membranes are subjected to accelerated-durability test at 100 degrees C and 15% relative humidity (RH) at open-circuit voltage (OCV) for 50 h and performance compared with the PEFC employing pristine Nafion-1135 membrane. PEFCs with composite membranes sustain the operating voltage better with fluoride-ion-emission rate at least an order of magnitude lower than PEFC with pristine Nafion-1135 membrane. Reduced gas-crossover, fast fuel-cell-reaction kinetics and superior performance of the PEFCs with Nafion-SiO2 and Nafion-MZP composite membranes in relation to the PEFC with pristine Nafion-1135 membrane support the long-term operational usage of the former in PEFCs. An 8-cell PEFC stack employing Nafion-SiO2 composite membrane is also assembled and successfully operated at 60 degrees C without external humidification.
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