Carbon Dioxide Vent for Direct Methanol Fuel Cells
Passive, stand-alone, direct methanol fuel cells require a pressure management system that releases CO2 produced in the anode chamber. However, this must be done without allowing the methanol fuel to escape. In this paper, two siloxane membranes are investigated and shown to selectively vent CO2 from the anode chamber. The addition of hydrophobic additives, 1,6-divinylperfluorohexane and 1,9-decadiene, improved the selectivity of the siloxane membranes. The best performing CO2 vent was obtained with 50:50 wt% poly(1-trimethyl silyl propyne) and 1,6-divinylperfluorohexane.
Published in Journal of Power Sources, Volume 185, Issue 1, Fall 2008, pages 392-400.
© Journal of Power Sources, 2008, Elsevier
Prakash, S., Mustain, W., & Kohl, P. (2008). Carbon Dioxide Vent for Direct Methanol Fuel Cells. Journal Of Power Sources, 185(1), 392-400.