Poly (vinyl alcohol) hydrogel membrane as electrolyte for direct borohydride fuel cells
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Poly (vinyl alcohol) hydrogel membrane as electrolyte for direct borohydride fuel cells
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| Creator |
Choudhury, N.A.
Prashant, S.K. Pitchumani, S. Sridhar, P. Shukla, A.K. |
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| Subject |
Fuel Cells
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| Description |
A direct borohydride fuel cell (DBFC) employing a poly (vinyl alcohol) hydrogel membrane
electrolyte (PHME) is reported. The DBFC employs an AB5 Misch metal alloy as anode and a goldplated
stainless steel mesh as cathode in conjunction with aqueous alkaline solution of sodium borohydride
as fuel and aqueous acidified solution of hydrogen peroxide as oxidant. Room temperature performances
of the PHME-based DBFC in respect of peak power outputs; ex-situ cross-over of oxidant,
fuel, anolyte and catholyte across the membrane electrolytes; utilization efficiencies of fuel and oxidant,
as also cell performance durability are compared with a similar DBFC employing a Nafion®-117 membrane
electrolyte (NME). Peak power densities of ~30 and ~40 mW cm–2 are observed for the DBFCs
with PHME and NME, respectively. The crossover of NaBH4 across both the membranes has been found
to be very low. The utilization efficiencies of NaBH4 and H2O2 are found to be ~24 and ~59%, respectively
for the PHME-based DBFC; ~18 and ~62%, respectively for the NME-based DBFC. The PHME
and NME–based DBFCs exhibit operational cell potentials of ~1⋅2 and ~1⋅4 V, respectively at a load current
density of 10 mA cm–2 for ~100 h.
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| Publisher |
Indian Academy of Sciences
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| Date |
2009
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/423/1/089-2009.pdf
Choudhury, N.A. and Prashant, S.K. and Pitchumani, S. and Sridhar, P. and Shukla, A.K. (2009) Poly (vinyl alcohol) hydrogel membrane as electrolyte for direct borohydride fuel cells. Journal of Chemical Sciences, 121 (5). pp. 647-654. ISSN 0974-3626 |
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| Relation |
http://cecri.csircentral.net/423/
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