A Poly(ethylene carbonate)/Lithium Bis(fluorosulfonyl)imide/Titanium Oxide Composite Electrolyte Containing a Pyrrolidinium-based Ionic Liquid

We describe electrochemical properties of a new quaternary poly(ethylene carbonate)/lithium bis(fluorosulfonyl)imide (LiFSI) mixture-based electrolyte containing TiO2 and N-methyl-N-propyl-pyrrolidinium bis(fluorosulfonyl)imide (Pyr13FSI). Incorporation of TiO2 and Pyr13FSI assured a reasonable ioni...

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Bibliographic Details
Published inECS transactions Vol. 66; no. 39; pp. 15 - 20
Main Authors Kimura, Kento, Tominaga, Yoichi
Format Journal Article
LanguageEnglish
Published The Electrochemical Society, Inc 27.07.2015
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Summary:We describe electrochemical properties of a new quaternary poly(ethylene carbonate)/lithium bis(fluorosulfonyl)imide (LiFSI) mixture-based electrolyte containing TiO2 and N-methyl-N-propyl-pyrrolidinium bis(fluorosulfonyl)imide (Pyr13FSI). Incorporation of TiO2 and Pyr13FSI assured a reasonable ionic conductivity of close to 10-5 S cm-1 at 30 oC with favorable Li transference number (tLi+) of 0.35 measured by an electrochemical method. A relatively fast conduction of Li cation in comparison with that of FSI anion was also proved by a study combining a solid-state NMR with a pulse field gradient (pfg) technique. In addition, anodic stabilities up to about 3.75 and 4.5 V vs. Li/Li+ were demonstrated at 40-60 oC and 30 oC, respectively.
ISSN:1938-5862
1938-6737
DOI:10.1149/06639.0015ecst