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- Title
Endurance of Nafion-composite membranes in PEFCs operating at elevated temperature under low relative-humidity.
- Authors
SAHU, A; JALAJAKSHI, A; PITCHUMANI, S; SRIDHAR, P; SHUKLA, A
- Abstract
PEFCs employing Nafion-silica (Nafion-SiO) and Nafion-mesoporous zirconium phosphate (Nafion-MZP) composite membranes are subjected to accelerated-durability test at 100°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-SiO 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-SiO composite membrane is also assembled and successfully operated at 60°C without external humidification. [Figure not available: see fulltext.]
- Subjects
PROTON exchange membrane fuel cells; NAFION; COMPOSITE materials; ARTIFICIAL membranes; SILICA; HIGH temperatures; HUMIDITY; CHEMICAL kinetics; ELECTRIC potential; ZIRCONIUM phosphate
- Publication
Journal of Chemical Sciences, 2012, Vol 124, Issue 2, p529
- ISSN
0974-3626
- Publication type
Article
- DOI
10.1007/s12039-011-0211-3