Advances in Electrolyte Materials for Solid-State Batteries

Dear Colleagues,

Solid-state batteries (SSBs) have emerged as a key technology for overcoming the limitations of conventional energy storage systems, attributed to their exceptional intrinsic safety and higher energy density. SSBs are now at a critical juncture towards commercialization, where the development of solid electrolytes remains a decisive factor for their commercial viability. However, existing solid electrolyte materials still face challenges that hinder widespread application. For instance, sulfide-based electrolytes exhibit high ionic conductivity but suffer from air sensitivity and a narrow electrochemical stability window. Solid polymer electrolytes, known for their flexibility and excellent interfacial adhesion, require improvements in oxidative stability and room-temperature ionic conductivity. Solid composite electrolytes, which integrate the advantages of organic and inorganic electrolytes, hold great promise, yet optimizing material selection and design strategies for enhanced practical performance remains a crucial research focus.

This Special Issue aims to provide a comprehensive overview of recent advances in solid electrolyte materials, including review articles summarizing their development and original research papers focused on performance enhancement and applications. By gathering cutting-edge research, this Special Issue seeks to accelerate the progress of solid electrolytes and facilitate the commercialization of SSBs. Key focus areas include the following:

• Ion transport mechanisms: fundamental studies on Li+/Na+ conduction pathways and interfacial kinetics;
• Stability optimization: strategies to enhance electrochemical, thermal, and mechanical robustness against electrode materials and operating conditions;
• Interface engineering: novel approaches to mitigate interfacial resistance and dendrite formation at electrode–electrolyte interfaces;
• Advanced characterization: multiscale analysis techniques for probing dynamic processes in SSEs;
• Scalable fabrication: manufacturing innovations for cost-effective, large-scale electrolyte production;
• Emerging design paradigms: computational modeling, biomimetic architectures, and machine learning-guided material discovery.

Dr. Nan Meng
Prof. Dr. Fang Lian
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• solid-state
• battery
• electrolyte
• polymer
• ceramic
• sulfide
• composite
• framework
• research article
• review