Chem
ReviewExploring and Understanding the Roles of Li2Sn and the Strategies to beyond Present Li-S Batteries
The Bigger Picture
Researches on Li-S batteries have long reached a crescendo in the area of high-energy Li-metal batteries. Although deep concerns and demands from material-design views have recently been expressed on the present and future exploration of Li-S batteries, we still believe that the intrinsic behaviors of Li2Sn, which involves both sulfur cathodes and Li anodes, are the inevitable core issues that hinder the successful application of Li-S batteries.
This review focuses on the chemistry-oriented construction and design of Li-S batteries. In-operando characterization techniques to explore the roles of Li2Sn are of exceptional interest to this field. The strategies to promote the conversion of Li2Sn by enhancing its thermostability and kinetics on sulfur cathodes are reviewed. And recent efficient methods to construct Li anodes to prevent Li dendrites and the corrosion by Li2Sn are also summarized. Finally, new insights are also proposed to design Li-S batteries for future application.
Graphical Abstract
UN Sustainable Development Goals
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These authors contributed equally