Phase Behavior and Electrochemical Characterization of Blends of Perfluoropolyether, Poly(ethylene glycol), and a Lithium Salt

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• 作者：Dominica H. C. Wong ; Alessandra Vitale ; Didier Devaux ; Austria Taylor ; Ashish A. Pandya ; Daniel T. Hallinan ; Jacob L. Thelen ; Sue J. Mecham ; Simon F. Lux ; Alexander M. Lapides ; Paul R. Resnick ; Thomas J. Meyer ; Robert M. Kostecki ; Nitash P. Balsara ; Joseph M. DeSimone
• 刊名：Chemistry of Materials
• 出版年：2015
• 出版时间：January 27, 2015
• 年：2015
• 卷：27
• 期：2
• 页码：597-603
• 全文大小：390K
• ISSN：1520-5002

文摘

Electrolytes consisting of low molecular weight perfluoropolyether (PFPE), poly(ethylene glycol) (PEG), and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) blends were prepared and systematically studied for salt concentration and stoichiometry effects on the materials鈥?thermal and electrochemical properties. Herein we report that the tunable ratios of PFPE and PEG allow for precise control of crystalline melting and glass transition temperature properties. These blended liquid polymer electrolytes are inherently nonflammable and remain stable in the amorphous phase from approximately 150 掳C down to 鈭?5 掳C. The ionic conductivity of the electrolytes are on the order of 10^鈥? S/cm at 30 掳C, which makes them suitable for rechargeable lithium batteries.