Unraveling the reversible redox mechanism of Li6PS5Cl solid electrolyte in all-solid-state lithium-sulfur batteries

Eunbyoul Lee; Heejun Kim; Hamin Choi; Se Young Kim; Kyung Yoon Chung

doi:10.1039/d4cc04476b

Unraveling the reversible redox mechanism of Li₆PS₅Cl solid electrolyte in all-solid-state lithium-sulfur batteries

Chem Commun (Camb). 2024 Dec 10;60(99):14834-14837. doi: 10.1039/d4cc04476b.

Authors

Eunbyoul Lee^{1

2}, Heejun Kim^{1

3}, Hamin Choi^{1

4}, Se Young Kim¹, Kyung Yoon Chung^{1

2}

Affiliations

¹ Energy Storage Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea. [email protected].
² Division of Energy & Environment Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea.
³ Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea.
⁴ Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea.

PMID: 39585080
DOI: 10.1039/d4cc04476b

Abstract

We reveal the reversible redox mechanism of Li₆PS₅Cl in composite cathodes for practical all-solid-state lithium-sulfur batteries. The limited electrochemical reactivity of the non-conducting sulfur-based active material induces the formation of Li₆PS₅Cl decomposition products, which allows the recrystallization of Li₆PS₅Cl through a reversible redox process, contributing to the composite cathode capacity.