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Sulfide electrolytes for all-solid-state sodium batteries: fundamentals and modification strategies
Shoumeng Yang1, Yi Tang1, Yu Yao2
1Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China. xhrui@gdut.edu.cn.
Materials Horizons
|November 25, 2024
Summary
Sulfide solid-state electrolytes show promise for sodium batteries but face stability issues. This review explores their properties, modifications, and electrode compatibility to advance all-solid-state sodium batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Sulfide solid-state electrolytes (SSSEs) are key for high-energy all-solid-state sodium batteries (ASSSBs).
- They offer high ionic conductivity and good mechanical properties.
- However, poor stability and limited electrode adaptability hinder their application.
Purpose of the Study:
- To comprehensively review SSSEs for ASSSBs.
- To elucidate Na+ conduction mechanisms based on composition and crystal structure.
- To outline strategies for improving SSSE performance and interfacial compatibility.
Main Methods:
- Literature review of SSSEs, focusing on compositional makeup and crystal structure.
- Analysis of modification techniques for enhancing ionic conductivity and stability.
- Examination of interfacial challenges and strategies with cathodes and anodes.
Main Results:
- SSSEs exhibit high ionic conductivity but suffer from limited electrochemical stability.
- Various modification strategies can improve ionic conductivity, stability, and electrode compatibility.
- Interfacial engineering is crucial for addressing challenges between SSSEs and electrodes.
Conclusions:
- Understanding SSSE properties and interfaces is vital for ASSSB development.
- Further research on modification and interfacial strategies is needed.
- Addressing current challenges will pave the way for practical SSSE-based ASSSBs.
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