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An Acrylate-based Quasi-solid Polymer Electrolyte Incorporating a Novel Dinitrile Poly(ethylene Glycol) Plasticizer for Lithium-ion Batteries by Kristian Leš; Jens Schönewerk; Jens Glenneberg; Carmen-Simona Jordan is a Engineering article available to read on EtoBox.

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Abstract The performance of solid polymer electrolytes is characterized by lower ionic conductivity than conventional liquid electrolytes but provides advantages in terms of operational safety. A quasi-solid polymer electrolyte (QSPE) based on a new plasticizer 4,7,10,13-tetraoxahexadecane-1,16-dinitrile (bCN-PEG4) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) incorporated into a polyacrylates matrix was successfully prepared via UV-induced copolymerization. The matrix consists of units of trimethylolpropane ethoxylate triacrylate (ETPTA), poly(ethylene glycol) diacrylate (PEGDA), and the monoacrylate poly(ethylene glycol) methyl ether acrylate (mPEGa). The QSPE containing 55 wt% bCN-PEG4 exhibits highly uniform morphology, thermal stability > 200 °C, ionic conductivity of 1.8 × 10−4 S cm−1 at 30 °C, and 1.3 × 10−3 S cm−1 at 80 °C, coupled with very high electrochemical stability (> 5 V vs. Li/Li+) and a low glass transition temperature (− 55.7 °C). A cycling experiment in a Li/QPSE/Li cell setup demonstrated the compatibility toward lithium metal additionally. The bCN-PEG4 offers an overall satisfying performance as a plasticizer in a poly(ethylene oxide)-based solid pol

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Author

Kristian Leš; Jens Schönewerk; Jens Glenneberg; Carmen-Simona Jordan

Publisher

Springer Science and Business Media LLC

Published

2022

Language

EN

Field

Engineering (Physical Sciences)