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Related Experiment Video

Updated: Jun 28, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

A Fluoroether Co-Solvent Engineering Interfacial and Solvation Dynamics for Durable Lithium-Oxygen Batteries.

Luhai Gai¹, Deliang Cui¹, Feng Dang²

¹State Key Laboratory of Crystal Materials, Shandong University, Jinan, P.R. China.

Angewandte Chemie (International Ed. in English)

|June 26, 2026

Summary

Researchers developed a new fluorinated ether co-solvent (FTE) for lithium-oxygen batteries. This innovation enhances electrolyte stability and promotes efficient lithium peroxide decomposition, improving battery performance and longevity.

Keywords:

Li–O2 battery fluoroether electrolyte interfacial stability reaction pathway solvation structure

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Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery

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Area of Science:

Energy Storage
Electrochemistry
Materials Science

Background:

Lithium-oxygen batteries (LOBs) offer high theoretical energy density but face challenges.
Key issues include electrolyte instability, lithium anode degradation, and poor reversibility of discharge products.

Purpose of the Study:

To design a novel electrolyte additive for improving LOB performance.
To address electrolyte volatility and enhance the stability of the lithium metal anode.
To promote the formation of a more reversible lithium peroxide discharge product.

Main Methods:

Synthesized a novel fluorinated ether co-solvent (FTE).
Incorporated FTE into a tetraethylene glycol dimethyl ether (TEG-based) electrolyte.
Investigated the impact of FTE on the solid electrolyte interphase (SEI) formation and Li+ solvation structure.
Evaluated the electrochemical performance of LOBs using the modified electrolyte.

Main Results:

FTE demonstrated a high boiling point, suppressing electrolyte evaporation.
A fluorine-rich SEI layer formed on the lithium anode, enhancing interfacial stability.
FTE modulated Li+ solvation, leading to a highly decomposable 3D porous Li2O2 structure.
LOBs with FTE/TEG-based electrolyte exhibited improved cycling stability, high capacity, and excellent rate capability.

Conclusions:

The novel FTE co-solvent effectively enhances LOB performance by addressing key challenges.
This multifunctional electrolyte design strategy promotes long-term reversibility for practical high-energy-density LOBs.
The study paves the way for advanced lithium-oxygen battery development.