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Preparation of polymer electrolytes based on the polymerized imidazolium ionic liquid and their applications in lithium batteries
Author(s) -
Li Mingtao,
Wang Lu,
Du Tingting
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40928
Subject(s) - ionic liquid , electrolyte , electrochemical window , ionic conductivity , lithium (medication) , electrochemistry , materials science , polymerization , salt (chemistry) , chemical engineering , polymer , imide , conductivity , polymer chemistry , lithium battery , inorganic chemistry , ionic bonding , chemistry , organic chemistry , ion , electrode , catalysis , composite material , medicine , engineering , endocrinology
The polymer electrolytes based on a polymerized ionic liquid (PIL) as polymer host and containing 1,2‐dimethyl‐3‐butylimidazolium bis(trifluoromethanesulfonyl)imide (BMMIM‐TFSI) ionic liquid, lithium TFSI salt, and nanosilica are prepared. The PIL electrolyte presents a high ionic conductivity, and it is 1.07 × 10 −3 S cm −1 at 60°C, when the BMMIM‐TFSI content reaches 60% (the weight ratio of BMMIM‐TFSI/PIL). Furthermore, the electrolyte exhibits wide electrochemical stability window and good lithium stripping/plating performance. Preliminary battery tests show that Li/LiFePO 4 cells with the PIL electrolytes are capable to deliver above 146 mAh g −1 at 60°C with very good capacity retention. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40928.