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Updated: Aug 3, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

High-Performance Quasi-Solid-State Lithium-Sulfur Battery with a Controllably Solidified Cathode-Electrolyte

Cai-Cai Li^1,2, Wen-Peng Wang^1,2, Xi-Xi Feng^1,2

¹CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, P. R. China.

ACS Applied Materials & Interfaces

|April 10, 2023

Summary

Thioacetamide additive in lithium-sulfur batteries prevents cathode failure by maintaining electrolyte liquidity at the interface. This boosts battery capacity, cycle life, and performance for advanced energy storage.

Keywords:

cathode−electrolyte interface gel polymer electrolyte in situ polymerization quasi-solid-state Li-S battery thioacetamide

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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Published on: March 7, 2018

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Lithium-sulfur (Li-S) batteries are a promising beyond lithium-ion energy storage technology.
Polysulfide dissolution and shuttle in liquid electrolytes cause rapid electrochemical failure of S cathodes.
Gel polymer electrolytes prevent shuttle but reduce polysulfide solubility, hindering performance.

Purpose of the Study:

To address the limitations of gel polymer electrolytes in Li-S batteries.
To improve polysulfide conversion kinetics and interfacial charge migration.
To enhance the overall capacity, cycle life, and rate performance of Li-S batteries.

Main Methods:

Utilized thioacetamide as a cathode additive.
Investigated the effect of thioacetamide on interfacial polymerization and polysulfide solubility.
Analyzed the resulting cathode-electrolyte interface structure and battery performance.

Main Results:

Thioacetamide inhibited interfacial polymerization and enhanced polysulfide and Li2S dissolution.
A liquid, sulfide-soluble electrolyte layer was preserved at the cathode/electrolyte interface.
The Li-S battery demonstrated high reversible capacity, long cycle life, and good rate performance.

Conclusions:

Thioacetamide effectively mitigates interfacial issues in Li-S batteries without additional catalysts.
The strategy preserves electrolyte liquidity, improving charge transfer and battery performance.
Controllably solidified interfaces show promise for next-generation energy storage applications.