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Ionic Liquid‐Based Membranes as Electrolytes for Advanced Lithium Polymer Batteries
Author(s) -
Navarra M. A.,
Manzi J.,
Lombardo L.,
Panero S.,
Scrosati Bruno
Publication year - 2011
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201000254
Subject(s) - electrolyte , ionic liquid , ionic conductivity , lithium (medication) , inorganic chemistry , lithium iron phosphate , materials science , anode , ethylene carbonate , polymer , imide , membrane , conductivity , propylene carbonate , chemical engineering , chemistry , polymer chemistry , electrode , electrochemistry , organic chemistry , catalysis , composite material , medicine , biochemistry , engineering , endocrinology
Gel‐type polymer electrolytes are formed by immobilizing a solution of lithium N , N ‐bis(trifluoromethanesulfonyl)imide (LiTFSI) in N ‐ n ‐butyl‐ N ‐ethylpyrrolidinium N , N ‐bis(trifluoromethanesulfonyl)imide (Py 24 TFSI) ionic liquid (IL) with added mixtures of organic solvents, such as ethylene, propylene and dimethyl carbonates (EC, PC, and DMC, respectively), into a poly(vinylidenefluoride‐ co ‐hexafluoropropylene) (PVdF‐HFP) matrix, and their properties investigated. The addition of the organic solvent mixtures results in an improvement of the ionic conductivity and in the stabilization of the interface with the lithium electrode. Conductivity values in the range of 10 −3 –10 −2 S cm −1 are obtained in a wide temperature range. These unique properties allow the effective use of these membranes as electrolytes for the development of advanced polymer batteries based on a lithium metal anode and an olivine‐type lithium iron phosphate cathode.