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Title: Improvement of Cycle Capability of Fe-Substituted Li2S-Based Positive Electrode Materials by Doping with Lithium Iodide
Authors: Takeuchi, Tomonari
Kageyama, Hiroyuki
Nakanishi, Koji
Kiuchi, Hisao
Katayama, Misaki
Inada, Yasuhiro
Ohta, Toshiaki
Fukunaga, Toshiharu
Sakaebe, Hikari
Kobayashi, Hironori
Matsubara, Eiichiro
Author's alias: 竹内, 友成
蔭山, 博之
中西, 康次
木内, 久雄
片山, 真祥
稲田, 康宏
太田, 俊明
福永, 俊晴
栄部, 比夏里
小林, 弘典
松原, 英一郎
Keywords: Batteries - Lithium
cycle performance
high capacity
Lithium sulfur battery
Issue Date: 27-Dec-2018
Publisher: The Electrochemical Society
Journal title: Journal of The Electrochemical Society
Volume: 166
Issue: 3
Start page: A5231
End page: A5236
Abstract: For an attempt to improve the cycle capability of the Li8FeS5 cells, we have prepared LiI-doped Li8FeS5 composite positive electrode materials. The obtained Li8FeS5·xLiI sample cells showed the improved cycle capability, though the initial capacity value decreased with proportional to the mass of LiI. The improved cycle performance was attributable to the suppressed resistance rise of the cells, due probably to the suppression of high-resistive surface precipitates formed by the reaction between the active material and the electrolyte. The dopant LiI would stabilize the local structure against Li extraction/insertion reactions, as well as suppress the reaction with the electrolyte, leading to the improved cycle performance.
Rights: © The Author(s) 2018. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY,, which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
DOI(Published Version): 10.1149/2.0361903jes
Appears in Collections:Journal Articles

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