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Solvate Ionic Liquids and Their Application to Lithium Batteries: Glyme-Lithium Bis(fluorosulfonyl)amide Equimolar Complexes

Published online by Cambridge University Press:  25 October 2012

Kazuki Yoshida ,
Mizuho Tsuchiya ,
Naoki Tachikawa ,
Kaoru Dokko  and
Masayoshi Watanabe
Kazuki Yoshida
Affiliation:
Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
Mizuho Tsuchiya
Affiliation:
Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
Naoki Tachikawa
Affiliation:
Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
Kaoru Dokko
Affiliation:
Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
Masayoshi Watanabe
Affiliation:
Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
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Abstract

The physicochemical properties of glyme-Li[FSA] (FSA: bis(fluorosulfonyl)amide) equimolar complexes were investigated. The self-diffusion coefficients of glymes and Li+ as determined by pulsed-field gradient spin-echo nuclear magnetic resonance spectroscopy in equimolar complexes were almost identical, suggesting that all of the glyme molecules coordinated with Li+. Electrochemical characterization revealed that the oxidative stability of glyme molecules was enhanced by complexing with Li+. Using [Li(glyme)1][FSA] electrolytes and a LiFePO4cathode, a lithium secondary battery could be stably operated for more than 100 cycles at room temperature.

Keywords

energy storageenergetic materialionic conductor

Information

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1473: Symposium BBB – Functional Materials and Ionic Liquids , 2012 , mrss12-1473-bbb02-03
Copyright
Copyright © Materials Research Society 2012

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References

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