Journal
MATERIALS TODAY
Volume 45, Issue -, Pages 62-76Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mattod.2020.10.021
Keywords
Anode protection; Lithium-sulfur batteries; Polysulfides; Solid electrolyte interphase; Electrolyte
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Funding
- National Natural Science Foundation of China [21825501, U1801257]
- National Key Research and Development Program [2016YFA0202500]
- Scientific and Technological Key Project of Shanxi Province [20191102003]
- Tsinghua University Initiative Scientific Research Program
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This review systematically analyzes the challenges of the Li metal anode in the presence of LiPSs, and summarizes the preliminary advances in Li metal anode protection to deal with LiPSs. The insight outlook is put forward to promote the development of practical Li-S batteries through a fundamental understanding and practical exploration of the Li metal anode.
The lithium-sulfur (Li-S) battery has raised great expectations as a next-generation high-energy density energy storage system. The multielectron dissolution-precipitation redox conversion of S affords a great contribution to its high specific energy. Spontaneously, the highly reactive Li metal anode always confronts soluble Li polysulfides (LiPSs) in a working Li-S battery, and parasitically side reactions occur inevitably. The challenges of the Li metal anode induced by soluble LiPSs emerge as roadblocks for practical Li-S batteries with the development of the S cathode from its infancy into growth stage. Therefore, the fundamental understanding of Li anode in the electrolyte with LiPSs and the targeted protection strategies are urgently required. In this review, the challenges of the Li metal anode in the presence of LiPSs are systematically analyzed. Then, the preliminary advances in Li metal anode protection to deal with LiPSs are summarized. Finally, an insightful outlook is put forward through both a fundamental understanding and a practical exploration of the Li metal anode to promote the development of practical Li-S batteries.
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