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Updated: Aug 5, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Solid-liquid electrolyte interphases in quasi-solid-state lithium-sulfur batteries with argyrodite-type solid
Jaimini Jessica Mistry1,2, Sramana Kundu3, Lechen Yang2,4
1School of Metallurgy and Materials, University of Birmingham, Pritchatts Road, Birmingham, UK. d.h.spencer-jolly@bham.ac.uk.
Faraday Discussions
|July 31, 2026
Summary
Ionic liquids form stable, low-resistance interfaces in quasi-solid-state lithium-sulfur batteries, unlike conventional ether electrolytes. This research highlights ionic liquids as promising catholytes for improved battery performance and stability.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Quasi-solid-state lithium-sulfur batteries offer high energy density but face challenges with resistive interphases.
- Solid-liquid electrolyte interphases (SLIEs) hinder performance at the separator-electrolyte boundary.
Purpose of the Study:
- Investigate SLIE formation between argyrodite solid electrolytes and different liquid catholytes.
- Compare the impact of ether-based and ionic liquid electrolytes on interphase properties.
Main Methods:
- Time-resolved electrochemical impedance spectroscopy (TREIS)
- X-ray photoelectron spectroscopy (XPS)
- Focused ion beam scanning electron microscopy (FIB-SEM)
Main Results:
- Ether-based electrolytes formed thick, resistive SLIEs (∼2000 Ω cm²), exacerbated by polysulfide dissolution.
- Ionic liquid electrolytes formed thin, stable, layered SLIEs with low resistance (∼150-220 Ω cm²).
- SLIE resistance remained constant over time and cycling with ionic liquids.
Conclusions:
- Catholyte selection critically influences SLIE formation and stability in lithium-sulfur batteries.
- Ionic liquids are suitable catholytes for achieving stable, low-resistance interfaces with argyrodite solid electrolytes.
- This work paves the way for enhanced performance in quasi-solid-state lithium-sulfur batteries.
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