Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 226, Issue 1-2, Pages 159-167Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2003.08.018
Keywords
poly(ether ether ketone) (PEEK); proton conductivity; methanol permeability; direct methanol fuel cell (DMFC)
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Sulfonated poly(ether ether ketone) (SPEEK) membranes with various degrees of sulfonation (DS) were prepared. Their proton conductivity and methanol permeability as a function of temperature were investigated. It was found that the proton conductivity of SPEEK membranes exceeded 10(-2) S/cm above 80 degreesC, which is close to that of Nafion(R) 115 membrane under the same condition. The methanol permeability of SPEEK membranes was about an order of magnitude lower than that of Nafion(R) 115 membrane. The direct methanol fuel cell (DMFC) performance of the SPEEK membranes was better than that of Nafion(R) 115 membrane at 80 degreesC. (C) 2003 Elsevier B.V. All rights reserved.
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