High lithium sulfide loading electrodes for practical Li/S cells with high specific energy

Dan Sun, Yoon Hwa, Liang Zhang, Jingwei Xiang, Jinghua Guo, Yunhui Huang, Elton J. Cairns

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

To date, Li2S has drawn significant attention as a positive electrode active material for rechargeable lithium cells due to its high theoretical specific capacity and capability of pairing with a lithium-free anode which can obviate any safety concern of the lithium metal anode when using sulfur. In recent years, various approaches have been employed to develop Li/Li2S rechargeable cells for commercialization that meet the performance goals for high energy/power applications. It is expected that high lithium sulfide-loading cells with long cycle life, an excellent capacity delivery and low electrolyte:sulfur weight ratio (E/S ratio) can be achieved. Here, we report a Li2S electrode comprised of a novel Li2S/KB@Cf nanocomposite which delivers an areal capacity of 7.56 mAh cm-2 and good cycling stability with a mass loading of 11.29 mg cm-2 and a robust 3-dimensional (3D) aluminum foam current collector with a high open area. The high conductivity and scalability of the active material, the availability of 3D current collection for the active material and the control of the electrolyte/sulfur ratio offer the potential of realization of practical Li/S cells.

Original languageEnglish (US)
Article number103891
JournalNano Energy
Volume64
DOIs
StatePublished - Oct 2019
Externally publishedYes

Keywords

  • Aluminum foam current collector
  • Electrolyte/sulfur ratio
  • High loading
  • Lithium sulfide
  • Lithium/sulfur cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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