Regulating surface chemistry of separator with LiF for advanced Li-S batteries

Abstract

Lithium-sulfur (Li-S) batteries have attracted intensive attention owing to their ultrahigh theoretical energy density. Nevertheless, the practical application of Li-S batteries is prevented by uncontrollable shuttle effect and retarded reaction kinetics. To address the above issues, lithium fluoride (LiF) was employed to regulate the surface chemistry of routine separator. The functional separator demonstrates a great ability to suppress active S loss and protect lithium anode. This work provides a facile strategy for the development of advanced Li-S batteries.

Graphical abstract

Keywords

Li-S batteries / LiF / functional separator

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Acknowledgments

This work was supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0402802 and 2017YFA0206700), the National Natural Science Foundation of China (Grant Nos. 21776265 and 51902304), the Natural Science Foundation of Anhui Province (Grant No. 1908085ME122), and the Fundamental Research Funds for the Central Universities (Wk2060140026).

Electronic Supplementary Material

Supplementary material is available in the online version of this article at https://doi.org/10.1007/s11708-021-0759-7 and is accessible for authorized users.

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