Abstract
Fuel cell represents a new energy conversion device, which promises to provide clean source of power. Fuel cell [particularly proton exchange membrane fuel cell and direct methanol fuel cell (DMFC)] is a promising candidate for transportation and portable power source applications. In DMFC, there is a problem of methanol crossover. In order to reduce such a problem, there has been an intensive research activity in the modification of Nafion. In the present investigation, self-assembled membranes were fabricated with sulfonated polyether ether ketone as the core part of the membrane. Aminated polysulfone and sulfonated polysulfone were used as the layers in order to prevent the crossover of methanol. The assembled membranes were characterized by ion exchange capacity, water and methanol absorption, and durability. The methanol permeability and selectivity ratio proved a strong influence on DMFC application. Scanning electron microscopy proved smooth surface, which established strong cohesive force for the polymer chains. Among the synthesized self-assembled membranes, the membrane with two bilayers was the best in terms of power density in DMFC. The membrane electrode assembly with two bilayers showed higher performance (~61.05 mW/cm2) than sulfonated poly(ether ether ketone) and Nafion in DMFC.
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Acknowledgements
The authors would like to thank National Renewable Energy Fellowship (NREF), India (vide letter number NREF/TU/2011/11, dated April 4, 2011), and DST (AFT) vide letter number DST/TSG/AF/2010/09 dated January 10, 2010 for their financial assistance to carry out the research work. The authors gratefully acknowledge DST-FIST and UGC-DRS for the instrumentation facilities in their department.
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Padmavathi, R., Sangeetha, D. Design of novel SPEEK-based proton exchange membranes by self-assembly method for fuel cells. Ionics 19, 1423–1436 (2013). https://doi.org/10.1007/s11581-013-0867-4
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DOI: https://doi.org/10.1007/s11581-013-0867-4