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Endurance of Nafion-composite membranes in PEFCs operating at elevated temperature under low relative-humidity

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
Depositing User: Id for Latest eprints
Date Deposited: 23 Jun 2012 06:00
Last Modified: 23 Jun 2012 06:00
URI: http://eprints.iisc.ac.in/id/eprint/44636

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