A natural carbonized leaf as polysulfide diffusion inhibitor for high-performance lithium-sulfur battery cells

Sheng Heng Chung, Arumugam Manthiram

研究成果: Article同行評審

105 引文 斯高帕斯(Scopus)

摘要

Attracted by the unique tissue and functions of leaves, a natural carbonized leaf (CL) is presented as a polysulfide diffusion inhibitor in lithium-sulfur (Li-S) batteries. The CL that is covered on the pure sulfur cathode effectively suppresses the polysulfide shuttling mechanism and enables the use of pure sulfur as the cathode. A low charge resistance and a high discharge capacity of 1320 mA h g-1 arise from the improved cell conductivity due to the innately integral conductive carbon network of the CL. The unique microstructure of CL leads to a high discharge/charge efficiency of >98 %, low capacity fade of 0.18 % per cycle, and good long-term cyclability over 150 cycles. The structural gradient and the micro/mesoporous adsorption sites of CL effectively intercept/trap the migrating polysulfides and facilitate their reutilization. The green CL polysulfide diffusion inhibitor thus offers a viable approach for developing high-performance lithium-sulfur batteries. Force of nature: A natural carbonized leaf (CL) covering a sulfur cathode utilizes a polysulfide locking-film on one side to suppress polysulfide diffusion and an electrolyte reservoir on the other side to absorb the electrolyte containing dissolved polysulfides. The CL inhibitor turns a critical organ of higher plants into a key component of highly reversible lithium-sulfur (Li-S) battery cells.

原文English
頁(從 - 到)1655-1661
頁數7
期刊ChemSusChem
7
發行號6
DOIs
出版狀態Published - 2014 一月 1

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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