Long-cycle-life lithium-sulfur batteries with lithium solvate ionic liquids

Shiro Seki; Nobuyuki Serizawa; Katsuhito Takei; Yasuhiro Umebayashi; Seiji Tsuzuki; Masayoshi Watanabe

doi:10.5796/electrochemistry.85.680

Long-cycle-life lithium-sulfur batteries with lithium solvate ionic liquids

Shiro Seki, Nobuyuki Serizawa, Katsuhito Takei, Yasuhiro Umebayashi, Seiji Tsuzuki, Masayoshi Watanabe

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The electrochemical properties of a sulfur positive electrode in equimolar glyme-Li salt mixtures were investigated. Cyclic voltammograms indicated that the insertion of Li into the sulfur/carbon composite electrode took place over at least three steps during the reduction process. In contrast, the broad anodic current suggested that the electrode kinetics for the extraction of Li were relatively slow. Stable charge-discharge operation of the Li-S cell consisting of a Li negative electrode with [Li(triglyme)][bis(trifluoromethanesulfonyl)amide] as the electrolyte was achieved at 800 cycles. This indicates that dissolution of Li₂S_x into the electrolyte was effectively suppressed in this system.

Original language	English
Pages (from-to)	680-682
Number of pages	3
Journal	Electrochemistry
Volume	85
Issue number	10
DOIs	https://doi.org/10.5796/electrochemistry.85.680
Publication status	Published - 2017
Externally published	Yes

Keywords

Battery Performance
Lithium Solvate Ionic Liquid
Lithium-sulfur Battery

ASJC Scopus subject areas

Electrochemistry

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10.5796/electrochemistry.85.680

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@article{a51b6594a21045639a78017d360ec28d,

title = "Long-cycle-life lithium-sulfur batteries with lithium solvate ionic liquids",

abstract = "The electrochemical properties of a sulfur positive electrode in equimolar glyme-Li salt mixtures were investigated. Cyclic voltammograms indicated that the insertion of Li into the sulfur/carbon composite electrode took place over at least three steps during the reduction process. In contrast, the broad anodic current suggested that the electrode kinetics for the extraction of Li were relatively slow. Stable charge-discharge operation of the Li-S cell consisting of a Li negative electrode with [Li(triglyme)][bis(trifluoromethanesulfonyl)amide] as the electrolyte was achieved at 800 cycles. This indicates that dissolution of Li2Sx into the electrolyte was effectively suppressed in this system.",

keywords = "Battery Performance, Lithium Solvate Ionic Liquid, Lithium-sulfur Battery",

author = "Shiro Seki and Nobuyuki Serizawa and Katsuhito Takei and Yasuhiro Umebayashi and Seiji Tsuzuki and Masayoshi Watanabe",

note = "Funding Information: This work was supported by the Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (JST), Japan. Publisher Copyright: {\textcopyright} The Electrochemical Society of Japan, All rights reserved. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2017",

doi = "10.5796/electrochemistry.85.680",

language = "English",

volume = "85",

pages = "680--682",

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publisher = "Electrochemical Society of Japan",

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T1 - Long-cycle-life lithium-sulfur batteries with lithium solvate ionic liquids

AU - Seki, Shiro

AU - Serizawa, Nobuyuki

AU - Takei, Katsuhito

AU - Umebayashi, Yasuhiro

AU - Tsuzuki, Seiji

AU - Watanabe, Masayoshi

N1 - Funding Information: This work was supported by the Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (JST), Japan. Publisher Copyright: © The Electrochemical Society of Japan, All rights reserved. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2017

Y1 - 2017

N2 - The electrochemical properties of a sulfur positive electrode in equimolar glyme-Li salt mixtures were investigated. Cyclic voltammograms indicated that the insertion of Li into the sulfur/carbon composite electrode took place over at least three steps during the reduction process. In contrast, the broad anodic current suggested that the electrode kinetics for the extraction of Li were relatively slow. Stable charge-discharge operation of the Li-S cell consisting of a Li negative electrode with [Li(triglyme)][bis(trifluoromethanesulfonyl)amide] as the electrolyte was achieved at 800 cycles. This indicates that dissolution of Li2Sx into the electrolyte was effectively suppressed in this system.

AB - The electrochemical properties of a sulfur positive electrode in equimolar glyme-Li salt mixtures were investigated. Cyclic voltammograms indicated that the insertion of Li into the sulfur/carbon composite electrode took place over at least three steps during the reduction process. In contrast, the broad anodic current suggested that the electrode kinetics for the extraction of Li were relatively slow. Stable charge-discharge operation of the Li-S cell consisting of a Li negative electrode with [Li(triglyme)][bis(trifluoromethanesulfonyl)amide] as the electrolyte was achieved at 800 cycles. This indicates that dissolution of Li2Sx into the electrolyte was effectively suppressed in this system.

KW - Battery Performance

KW - Lithium Solvate Ionic Liquid

KW - Lithium-sulfur Battery

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