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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Understanding the Electrochemical Window of Solid-State Electrolyte in Full Battery Application
Chen Bai1, Yuhang Li1,2, Guanyou Xiao1,2
1Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center, Institute of Materials Research (iMR), Tsinghua Shenzhen International Graduate School, Shenzhen 518055, China.
Chemical Reviews
|May 9, 2025
Summary
Solid-state Li batteries offer safety but face challenges from limited electrochemical windows (ECW) in electrolytes. This review details ECW factors, measurement, and strategies to improve interfacial stability for better battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state Li batteries (SSLBs) are a safer alternative to conventional Li-ion batteries.
- Limited electrochemical windows (ECW) of solid-state electrolytes (SEs) hinder SSLB performance and application.
- Understanding ECW limitations is crucial for developing advanced energy storage systems.
Purpose of the Study:
- To provide a comprehensive review of solid-state electrolytes (SEs) and their electrochemical windows (ECW).
- To analyze factors influencing ECW and interfacial stability in full solid-state Li batteries (SSLBs).
- To propose standardized testing procedures for ECW measurement and discuss strategies for improvement.
Main Methods:
- Historical overview of SE development and structural characteristics.
- Examination of methodologies for calculating and measuring ECW.
- Analysis of parameters affecting thermodynamic ECW and interfacial stability.
Main Results:
- Classification of various SE "windows" and their impact on interfacial stability.
- Identification of key parameters influencing the thermodynamic ECW of SEs.
- Synthesis of strategies to overcome ECW limitations and enhance interfacial compatibility.
Conclusions:
- Addressing narrow ECWs in SEs is critical for advancing full SSLB technology.
- Standardized ECW testing and targeted strategies are essential for designing robust SSLBs.
- Improved understanding of interfacial phenomena is key to unlocking the full potential of SSLBs.
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