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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Abstract
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 |
|---|---|
| Publication: | JOURNAL OF CHEMICAL SCIENCES |
| Publisher: | Indian Academy of Sciences. |
| 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 |
| URI: | http://eprints.iisc.ac.in/id/eprint/44636 |
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