Issue 38, 2021

High-performance lithium–sulfur batteries enabled by regulating Li2S deposition

Abstract

Lithium–sulfur batteries (LSBs) have received intensive attention in recent years due to their high theoretical energy density derived from the lithiation of sulfur. In the discharge process, sulfur transforms into lithium polysulfides (LiPSs) that dissolve in liquid electrolytes and then into insoluble Li2S precipitated on the electrode surface. The electronically and ionically insulating Li2S leads to two critical issues, including the sluggish reaction kinetics from LiPSs to Li2S and the passivation of the electrode. In this regard, controlling the Li2S deposition is significant for improving the performance of LSBs. In this perspective, we have summarized the recent achievements in regulating the Li2S deposition to enhance the performance of LSBs, including the solution-mediated growth of Li2S, sulfur host enhanced nucleation and catalysis induced kinetic improvement. Moreover, the challenges and possibilities for future research studies are discussed, highlighting the significance of regulating the Li2S deposition to realize the high electrochemical performance and promote the practical uses of LSBs.

Graphical abstract: High-performance lithium–sulfur batteries enabled by regulating Li2S deposition

Article information

Article type
Perspective
Submitted
03 ⵢⵓⵍ 2021
Accepted
27 ⵖⵓⵛ 2021
First published
22 ⵛⵓⵜ 2021

Phys. Chem. Chem. Phys., 2021,23, 21385-21398

High-performance lithium–sulfur batteries enabled by regulating Li2S deposition

Q. Lin, L. Huang, W. Liu, Z. Li, R. Fang, D. Wang, Q. Yang and W. Lv, Phys. Chem. Chem. Phys., 2021, 23, 21385 DOI: 10.1039/D1CP03030B

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