Sahu, AK and Jalajakshi, A and Pitchumani, S and Sridhar, P and Shukla, AK (2012) Endurance of Nafion-composite membranes in PEFCs operating at elevated temperature under low relative-humidity. In: JOURNAL OF CHEMICAL SCIENCES, 124 (2). pp. 529-536.
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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.
|Item Type:||Journal Article|
|Additional Information:||Copyright this article is belongs to Indian Academy of Sciences.|
|Keywords:||Nafion–SiO2 composite;nafion–MZP composite;nafion-1135; fluoride-ion-emission rate;gas-crossover;polymer electrolyte fuel cell.|
|Department/Centre:||Division of Chemical Sciences > Solid State & Structural Chemistry Unit|
|Date Deposited:||23 Jun 2012 06:00|
|Last Modified:||23 Jun 2012 06:00|
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