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Title: A stable graphite electrode in superconcentrated LiTFSI-DME/DOL electrolyte and its application in lithium-sulfur full battery

Abstract

Graphical abstract: In superconcentrated ether-based solutions, the formed SEI film inhibits electrolyte decomposition and graphite exfoliation caused by co-intercalation of solvents. Thus, reversible lithium intercalation and de-intercalation at a graphite electrode has been realized. - Highlights: • Prelithiated graphite anodes are coupled with sulfur composite cathodes to form a Li–S full cell in superconcentrated LiTFSI-DME/DO electrolyte. • The introduced superconcentrated ether-based electrolyte permits reversible lithium intercalation and de-intercalation at a graphite electrode. • The assembled Li–S full battery exhibits better cycle performance and coulombic efficiencies. - Abstract: Herein, prelithiated graphite anodes are coupled with sulfur composite cathodes to form a Li–S full cell in superconcentrated ether electrolyte. This novel system is effective in avoiding sever corrosion of Li-metal anode and significantly improving the safety of present Li–S cell, owing to the replacement of Li-metal anode with graphite. The introduced superconcentrated ether electrolyte has a unique networking structure of Li cations and TFSI anions with Li{sup +}-solvating DME/DOL solvents, which is conducive to form a stable TFSI-derived surface film on the graphite electrode. The stable and dense TFSI-derived film inhibits further electrolyte decomposition and graphite exfoliation caused by co-intercalation of solvents, allowing reversible lithium intercalation and de-intercalation at a graphite electrode.more » Besides, the severe polysulfides shuttle is also suppressed by the concentrated ether-based solutions. Consequently, the assembled graphite-sulfur full battery retains outstanding capacity of 686 mAh g{sup −1}{sub sulfur} at 0.1C rate after 105 cycles, along with high Coulombic efficiency.« less

Authors:
; ; ; ; ;
Publication Date:
OSTI Identifier:
22730437
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 95; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANODES; CATHODES; CLATHRATES; ELECTROLYTES; FILMS; GRAPHITE; LITHIUM; SOLVENTS; SULFIDES; SULFUR

Citation Formats

Zeng, Pan, Han, Yamiao, Duan, Xiaobo, Jia, Guichong, Huang, Liwu, and Chen, Yungui. A stable graphite electrode in superconcentrated LiTFSI-DME/DOL electrolyte and its application in lithium-sulfur full battery. United States: N. p., 2017. Web. doi:10.1016/J.MATERRESBULL.2017.07.018.
Zeng, Pan, Han, Yamiao, Duan, Xiaobo, Jia, Guichong, Huang, Liwu, & Chen, Yungui. A stable graphite electrode in superconcentrated LiTFSI-DME/DOL electrolyte and its application in lithium-sulfur full battery. United States. https://doi.org/10.1016/J.MATERRESBULL.2017.07.018
Zeng, Pan, Han, Yamiao, Duan, Xiaobo, Jia, Guichong, Huang, Liwu, and Chen, Yungui. Wed . "A stable graphite electrode in superconcentrated LiTFSI-DME/DOL electrolyte and its application in lithium-sulfur full battery". United States. https://doi.org/10.1016/J.MATERRESBULL.2017.07.018.
@article{osti_22730437,
title = {A stable graphite electrode in superconcentrated LiTFSI-DME/DOL electrolyte and its application in lithium-sulfur full battery},
author = {Zeng, Pan and Han, Yamiao and Duan, Xiaobo and Jia, Guichong and Huang, Liwu and Chen, Yungui},
abstractNote = {Graphical abstract: In superconcentrated ether-based solutions, the formed SEI film inhibits electrolyte decomposition and graphite exfoliation caused by co-intercalation of solvents. Thus, reversible lithium intercalation and de-intercalation at a graphite electrode has been realized. - Highlights: • Prelithiated graphite anodes are coupled with sulfur composite cathodes to form a Li–S full cell in superconcentrated LiTFSI-DME/DO electrolyte. • The introduced superconcentrated ether-based electrolyte permits reversible lithium intercalation and de-intercalation at a graphite electrode. • The assembled Li–S full battery exhibits better cycle performance and coulombic efficiencies. - Abstract: Herein, prelithiated graphite anodes are coupled with sulfur composite cathodes to form a Li–S full cell in superconcentrated ether electrolyte. This novel system is effective in avoiding sever corrosion of Li-metal anode and significantly improving the safety of present Li–S cell, owing to the replacement of Li-metal anode with graphite. The introduced superconcentrated ether electrolyte has a unique networking structure of Li cations and TFSI anions with Li{sup +}-solvating DME/DOL solvents, which is conducive to form a stable TFSI-derived surface film on the graphite electrode. The stable and dense TFSI-derived film inhibits further electrolyte decomposition and graphite exfoliation caused by co-intercalation of solvents, allowing reversible lithium intercalation and de-intercalation at a graphite electrode. Besides, the severe polysulfides shuttle is also suppressed by the concentrated ether-based solutions. Consequently, the assembled graphite-sulfur full battery retains outstanding capacity of 686 mAh g{sup −1}{sub sulfur} at 0.1C rate after 105 cycles, along with high Coulombic efficiency.},
doi = {10.1016/J.MATERRESBULL.2017.07.018},
url = {https://www.osti.gov/biblio/22730437}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 95,
place = {United States},
year = {2017},
month = {11}
}