Synthesis of Li Conductive Polymer Layer on 3D Structured S Cathode by Photo-Polymerization for Li-S Batteries

Seongki Ahn, Hitoshi Mikuriya, Eri Kojima, Tetsuya Osaka*

*この研究の対応する著者

研究成果: Article査読

抄録

The dissolution of lithium polysulfide (Li2Sx, 4 x 8, LiPS) during charge/discharge testing is a critical issue hindering the practical application of lithium-sulfur batteries (LSBs). To suppress LiPS dissolution, we propose a facile method to fabricate a Liion- conductive polymer layer by photopolymerization. The electrochemical performance of LSBs was investigated by preparing small pouch cells containing a three-dimensional (3D) structured sulfur-based cathode that either was or was not layered with the new polymer. Analysis of the electrolyte in the LSB pouch cell by UV-Vis spectroscopy revealed that a 3D S cathode with polymer layer shows a good discharge capacity of 535 mA h g-1 and a coulombic efficiency (CE) of over 96% after 40 cycles. In comparison, the 3D S cathode without a polymer layer has a poor discharge capacity of 389 mA h g-1 and a CE of over 22% after 40 cycles. The dissolution suppressing ability of our new polymer layer demonstrates promise for the practical application of LSBs.

本文言語English
論文番号030546
ジャーナルJournal of the Electrochemical Society
169
3
DOI
出版ステータスPublished - 2022 3月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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