論文

査読有り
2015年10月

Role of the solid electrolyte interphase on a Li metal anode in a dimethylsulfoxide-based electrolyte for a lithium-oxygen battery

JOURNAL OF POWER SOURCES
  • Norihiro Togasaki
  • ,
  • Toshiyuki Momma
  • ,
  • Tetsuya Osaka

294
開始ページ
588
終了ページ
592
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jpowsour.2015.06.092
出版者・発行元
ELSEVIER SCIENCE BV

The effect of the solid electrolyte interphase (SEI) on a Li anode on the charge-discharge cycling performance in 1 M LiTFSI/dimethylsulfoxide electrolyte solution is examined by using charge-discharge cycling. The chemical structure of the surface and interior of the SEI strongly affects the cycling performance of the anode. The observed coulombic efficiency is low (<45%) when organic compounds such as lithium alkyl carbonates and polycarbonate form predominantly on the surface and interior. However, when inorganic compounds such as Li2CO3, Li2O, and LiF form instead, the coulombic efficiency increases to >85%. This enhanced efficiency remains constant regardless of the O-2 content and despite <1000 ppm concentration of the contaminant H2O in the electrolyte. Thus, the lithium surface should be protected by inorganic compounds prior to cycling to prevent it from undergoing side reactions with the electrolyte during cycling in the electrolyte. (C) 2015 Elsevier B.V. All rights reserved.

Web of Science ® 被引用回数 : 18

リンク情報
DOI
https://doi.org/10.1016/j.jpowsour.2015.06.092
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000358968400075&DestApp=WOS_CPL