A rationally designed polysulfide-trapping interface on the polymeric separator for high-energy Li–S batteries

Chi Hao Chang, Sheng Heng Chung, Sanjay Nanda, Arumugam Manthiram

研究成果: Article同行評審

20 引文 斯高帕斯(Scopus)

摘要

A coating layer consisting of a layer of graphene oxide (GO) inserted in between two layers of multi-walled carbon nanotubes (MWCNT) forms a multifunctional polysulfide-trapping triple-interface on the polymeric separator for lithium–sulfur (Li–S) batteries. The top and bottom highly conductive MWCNT interfaces are able to physically inhibit polysulfide diffusion and effectively reutilize the trapped active material during cycling. The inserted ultrathin GO layer with negatively charged carboxyl groups, on the other hand, electrostatically repels the migrating polysulfide anions. The stacked GO sheets also extensively prolong the migration routes of the polysulfides. Additionally, the “buffer zones” interspersed within the triple-interface accommodate the migrating polysulfides. Thus, the sandwiched separators enable Li–S cells with a high-sulfur-loading (10 mg cm−2), high areal capacity (10.9 mA h cm−2), and stable cycling ability even though the coating layer is ultra-thin (∼17 μm) and light-weight (∼0.23 mg cm−2).

原文English
頁(從 - 到)72-78
頁數7
期刊Materials Today Energy
6
DOIs
出版狀態Published - 2017 12月 1

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 材料科學(雜項)
  • 核能與工程
  • 燃料技術
  • 能源工程與電力技術

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