Journal
CHEMPHYSCHEM
Volume 8, Issue 7, Pages 1103-1107Publisher
WILEY-BLACKWELL
DOI: 10.1002/cphc.200600782
Keywords
fuel cell; ionic liquids; membranes; proton transport
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A series of ionic liquids (ILs) are prepared by neutralizing tertiary amines with N,N-bis(trifluoromethanesulfonyl)imide (HTFSI). As demonstrated by thermal and electrochemical characterizations, these ILs have very good temperature stability and a high ionic conductivity, that is, of the order of 10(-2) S cm(-1). By incorporating these ILs into a poly(vinylidenfluoride-co-hexafluoroproplene) polymer matrix, membranes with a high melting temperature, high decomposition point and with an ionic conductivity of about 10(-2) S cm(-1) at 140 degrees C, are obtained. These IL-based, proton-conducting membranes are proposed as new polymer electrolytes for high-temperature polymer electolyte membrane fuel cells (PEMFCs).
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