New Types of Bronsted Acid-Base lonic Liquids-Based Membranes for Applications in PEMFCs

摘要

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)Scm-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 W2 Scm-1 at 140 deg C,are obtained.These IL-based,proton-conducting membranes are proposed as new polymer electrolytes for high-temperature polymer electrolyte membrane uel cells(PEMFCs).