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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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A thin free-standing composite solid electrolyte film for solid-state lithium metal batteries.
Yongtao Wang1,2, Lingqiao Wu1,2, Xianwei Guo1,2
1Institute of Advanced Battery Materials and Devices, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, P. R. China. hj-yu@bjut.edu.cn.
Chemical Communications (Cambridge, England)
|June 20, 2022
Summary
A novel composite solid electrolyte film was developed for solid-state lithium metal batteries. This thin film offers high ionic conductivity and electrochemical stability, enabling stable battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state batteries offer enhanced safety over liquid electrolyte batteries.
- Developing stable and conductive solid electrolytes is crucial for high-performance lithium metal batteries.
Purpose of the Study:
- To develop a thin, free-standing composite solid electrolyte (CSE) film.
- To evaluate the electrochemical properties and battery performance of the CSE film.
Main Methods:
- Tape casting and solution infusion were used to prepare the CSE film (∼15 μm).
- Ionic conductivity and electrochemical stability were measured.
- Solid-state lithium metal batteries using LiCoO2 cathodes were assembled and tested.
Main Results:
- The CSE film exhibited high ionic conductivity (2.76 × 10-4 S cm-1 at 25 °C).
- A wide electrochemical stability window of 4.8 V vs. Li+/Li was achieved.
- CSE-based solid-state batteries showed good cycling stability and capacity retention at a 4.5 V cut-off voltage.
Conclusions:
- The developed composite solid electrolyte film is a promising candidate for solid-state lithium metal batteries.
- The film's properties support stable operation of high-voltage lithium metal battery systems.
