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Title: Lithium-Sulfur Batteries: from Liquid to Solid Cells?

Lithium-sulfur (Li-S) batteries supply a theoretical specific energy 5 times higher than that of lithium-ion batteries (2,500 vs. ~500 Wh kg-1). However, the insulating properties and polysulfide shuttle effects of the sulfur cathode and the safety concerns of the lithium anode in liquid electrolytes are still key limitations to practical use of traditional Li-S batteries. In this review, we start with a brief discussion on fundamentals of Li-S batteries and key challenges associated with the conventional liquid cells. Then, we introduce the most recent progresses in the liquid systems, including the sulfur positive electrodes, the lithium negative electrodes, and the electrolytes and binders. We discuss the significance of investigating electrode reaction mechanisms in liquid cells using in-situ techniques to monitor the compositional and morphological changes. By moving from the traditional liquid cells to recent solid cells, we discuss the importance of this game-changing shift with positive advances in both solid electrolytes and electrode materials. Finally, the opportunities and perspectives for future research on Li-S batteries are presented.
Authors:
 [1] ;  [2]
  1. Zhejiang Univ., Hangzhou (China).
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
OSTI Identifier:
1185628
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 3; Journal Issue: 3; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE batteries; solid electrolyte; electrical energy storage; lithium-sulfur batteries