PVA-PSSA Membrane with Interpenetrating Networks and its Methanol Crossover Mitigating Effect in DMFCs
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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Title |
PVA-PSSA Membrane with Interpenetrating Networks and its
Methanol Crossover Mitigating Effect in DMFCs
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Creator |
Sahu, A.K.
Selvarani, G. Pitchumani, S. Sridhar, P. Shukla, A.K. Narayanan, N. Banerjee, A. Chandrakumar, N. |
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Subject |
Electrochemical Power Sources
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Description |
A membrane with interpenetrating networks between poly�vinyl alcohol� �PVA� and poly�styrene sulfonic acid� �PSSA� coupled
with a high proton conductivity is realized and evaluated as a proton exchange membrane electrolyte for a direct methanol fuel cell
�DMFC�. Its reduced methanol permeability and improved performance in DMFCs suggest the new blend as an alternative
membrane to Nafion membranes. The membrane has been characterized by powder X-ray diffraction, scanning electron microscopy,
time-modulated differential scanning calorimetry, and thermogravimetric analysis in conjunction with its mechanical
strength. The maximum proton conductivity of 3.3 � 10−2 S/cm for the PVA–PSSA blend membrane is observed at 373 K. From
nuclear magnetic resonance imaging and volume localized spectroscopy experiments, the PVA–PSSA membrane has been found
to exhibit a promising methanol impermeability, in DMFCs. On evaluating its utility in a DMFC, it has been found that a peak
power density of 90 mW/cm2 at a load current density of 320 mA/cm2 is achieved with the PVA–PSSA membrane compared to
a peak power density of 75 mW/cm2 at a load current density of 250 mA/cm2 achievable for a DMFC employing Nafion
membrane electrolyte while operating under identical conditions; this is attributed primarily to the methanol crossover mitigating
property of the PVA–PSSA membrane.
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Publisher |
The Electrochemical Society
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Date |
2008
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Type |
Article
PeerReviewed |
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Format |
application/pdf
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Identifier |
http://cecri.csircentral.net/208/1/069-2008.pdf
Sahu, A.K. and Selvarani, G. and Pitchumani, S. and Sridhar, P. and Shukla, A.K. and Narayanan, N. and Banerjee, A. and Chandrakumar, N. (2008) PVA-PSSA Membrane with Interpenetrating Networks and its Methanol Crossover Mitigating Effect in DMFCs. Journal of the Electrochemical Society, 155 (7). B686-B695. ISSN 0013-4651 |
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Relation |
http://cecri.csircentral.net/208/
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