Issue 3, 2022

Chemical stability of sulfide solid-state electrolytes: stability toward humid air and compatibility with solvents and binders

Abstract

Sulfide solid electrolyte (S-SE) based all-solid-state batteries (ASSBs) have received particular attention due to their outstanding ionic conductivity and higher energy density over conventional lithium-ion batteries. Nevertheless, their chemical instability toward air and their poor compatibility with solvents and binders are significant factors that impede the commercialization of S-SE-based ASSBs. This review aims to compile fundamental principles about the chemical stability of S-SEs and strategies designed to fabricate sulfide-based high energy density practical ASSBs covering their air stability and compatibility in slurry-based processes. Firstly, fundamental principles about the chemical stability of S-SEs towards air and their compatibility with solvents and binders are highlighted. Moreover, characterization techniques are examined to better understand the chemical stability of S-SEs. Secondly, the latest progress and effective strategies to improve the stability and compatibility of S-SEs are summarized. Encouraging demonstrations on improving the compatibility of S-SEs with solvents and binders are exemplified. Finally, challenges, future directions, and our perspectives on improving the chemical stability of S-SEs are presented.

Graphical abstract: Chemical stability of sulfide solid-state electrolytes: stability toward humid air and compatibility with solvents and binders

Article information

Article type
Review Article
Submitted
27 sep 2021
Accepted
26 jan 2022
First published
26 jan 2022

Energy Environ. Sci., 2022,15, 991-1033

Chemical stability of sulfide solid-state electrolytes: stability toward humid air and compatibility with solvents and binders

Y. Nikodimos, C. Huang, B. W. Taklu, W. Su and B. J. Hwang, Energy Environ. Sci., 2022, 15, 991 DOI: 10.1039/D1EE03032A

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