New types of Brönsted acid-base ionic liquids-based membranes for applications in PEMFCs.
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 degrees C, are obtained. These IL-based, proton-conducting membranes are proposed as new polymer electrolytes for high-temperature polymer electrolyte membrane fuel cells (PEMFCs).
Fernicola
Alessandra
A
Department of Chemistry, University of Rome La Sapienza, 00185 Rome, Italy.
Panero
Stefania
S
Scrosati
Bruno
B
Tamada
Masahiro
M
Ohno
Hiroyuki
H
D000143:Acids / Q000737:chemistry*; D000468:Alkalies / Q000737:chemistry*; D004553:Electric Conductivity; D004573:Electrolytes / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry*; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry; D013696:Temperature
D000143:Acids; D000468:Alkalies; D004573:Electrolytes; D052578:Ionic Liquids; D011108:Polymers