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Updated: May 2, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Polymeric Ionic Liquid-Enabled In Situ Protection of Li Anodes for High-Performance Li-O₂ Batteries.

Dan Li^1,2, Qian Chen³, Rui Li¹

¹Nation & Local United, Engineering Laboratory for Power Batteries, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, China.

|November 13, 2024

Summary

A new polyionic liquid protects lithium anodes in lithium-oxygen batteries, significantly improving cycling stability and preventing degradation. This advance offers a novel strategy for enhancing battery performance through interfacial engineering.

Keywords:

Interface evolution Li anode protection Li-O2Batteries Synchrotron X-ray tomography shuttle effect

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

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

Published on: March 7, 2018

Area of Science:

Electrochemistry
Materials Science
Battery Technology

Background:

Redox mediators (RMs) improve Li-O₂ battery cycling but suffer from shuttle effects causing Li anode damage.
Developing effective Li anode protection is crucial for advancing Li-O₂ battery technology.

Purpose of the Study:

To introduce a novel polyionic liquid, poly (1-Butyl-3-vinylimidazolium bis(trifluoromethanesulfonylimine)) ([PBVIm]-TFSI), as a Li anode protection additive.
To investigate the mechanism of Li anode protection offered by [PBVIm]-TFSI in LiI-mediated Li-O₂ batteries.

Main Methods:

Addition of [PBVIm]-TFSI to LiI-mediated Li-O₂ battery electrolytes.
Cycling performance evaluation under specific current density (200 mA·g^-1).
Synchrotron X-ray tomography and X-ray photoelectron spectroscopy (XPS) for analyzing the protective layer.

Main Results:

The [PBVIm]-TFSI additive formed a protective cationic shield on the Li anode, promoting uniform Li⁺ deposition.
Li-O₂ cells with [PBVIm]-TFSI achieved 105 cycles, a significant improvement over the 38 cycles in cells without the additive.
Analysis revealed the formation mechanism and structure of the protective layer.

Conclusions:

Polyionic liquid ([PBVIm]-TFSI) effectively protects the Li anode in Li-O₂ batteries, mitigating shuttle effects and corrosion.
This interfacial engineering approach substantially enhances battery cycling stability and performance.
The study provides a new strategy for developing robust Li anode protection in advanced battery systems.