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New Types of Brönsted Acid–Base Ionic Liquids‐Based Membranes for Applications in PEMFCs
Author(s) -
Fernicola Alessandra,
Panero Stefania,
Scrosati Bruno,
Tamada Masahiro,
Ohno Hiroyuki
Publication year - 2007
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200600782
Subject(s) - membrane , ionic liquid , ionic conductivity , electrolyte , thermal stability , polymer , polymer chemistry , imide , materials science , conductivity , chemical engineering , melting point , electrochemistry , ionic bonding , thermal decomposition , chemistry , organic chemistry , ion , electrode , composite material , catalysis , biochemistry , engineering
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‐hexafluoropropylene) 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 °C, are obtained. These IL‐based, proton‐conducting membranes are proposed as new polymer electrolytes for high‐temperature polymer electrolyte membrane fuel cells (PEMFCs).