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New all solid‐state polymer electrolyte based on epoxy resin and ionic liquid for high temperature applications
Author(s) -
Oliveira da Silva Luís Carlos,
Soares Bluma Guenther
Publication year - 2018
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.45838
Subject(s) - ionic liquid , electrolyte , materials science , thermogravimetric analysis , epoxy , dielectric spectroscopy , cyclic voltammetry , ionic conductivity , thermal stability , electrochemistry , chemical engineering , curing (chemistry) , glass transition , polymer , polymer chemistry , composite material , electrode , chemistry , organic chemistry , engineering , catalysis
Flexible epoxy network loaded with high amount of ionic liquid (IL) 1‐decyl‐3‐methylimidazolium bromide ([DMIM]Br) has been reported by using a mixture of polyol amine as curing agent. The IL presents good electrochemical response even at 170 °C, as no evidence of redox reactions was observed. The incorporation of as high as 50 wt % of this IL within the epoxy matrix resulted in solid and flexible electrolyte with good thermal stability below 180 °C, as measured by thermogravimetric analysis and ionic conductivity of around 10 −6 S cm −1 at room temperature and higher than 10 −3 S cm −1 at high temperature. This electrolyte presented a prodigious potential for applications in electrochemical devices at high temperature like batteries and supercapacitors, and the flexibility of this solid electrolyte persist at low temperature because of its low glass transition temperature. Furthermore, leakage problems were not observed. Thereby, impedance spectroscopy and cyclic voltammetry were performed to characterize the electrochemical properties. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45838.