The effect of BPSH post treatment on DMFC performance and properties

Michael Anthony Hickner, Y. Kim, J. McGrath, P. Zelenay, B. Pivovar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Direct methanol fuel cells (DMFCs) are being investigated for applications ranging from milliwatt (cell phones) to kilowatt (APUs) size scales. A common pitfall for DMFCs has been the inability of the electrolyte, typically Nafion, to act as an effective methanol barrier. Methanol crossover adversely affects the cell by lowering the cell voltage due to a mixed potential at the cathode and lower fuel utilization. Improved DMFC performance was demonstrated with sulfonated poly(arylene ether sulfone) copolymer membranes (1). Another study has shown the dependence of polymer properties and morphology on the post treatment of such membranes (2). In agreement with measurements on free-standing films, the fuel cell characteristics of these membranes have been found to have a strong dependence on acidification treatment. Methanol permeability, proton conductivity, and electro-osmotic drag coefficient all were found to increase when the membranes were acidified under boiling conditions versus a low-temperature process.

Original languageEnglish (US)
Title of host publicationProton Conducting Membrane Fuel Cells III - Proceedings of the International Symposium
EditorsM. Murthy, T.F. Fuller, J.W. Zee, S. Gottesfeld
Pages530-540
Number of pages11
VolumePV 2002-31
StatePublished - 2005
EventProton Conducting Membrane Fuel Cells III - Proceedings of the International Symposium - Salt Lake City, UT, United States
Duration: Oct 21 2002Oct 23 2002

Other

OtherProton Conducting Membrane Fuel Cells III - Proceedings of the International Symposium
CountryUnited States
CitySalt Lake City, UT
Period10/21/0210/23/02

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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