| Abstract Scope |
High-energy-density lithium-ion batteries are essential for applications such as electric vehicles and mobile electronics. However, commercial batteries based on liquid electrolytes still face major challenges, including safety risks and limited energy density. Solid-state batteries have therefore attracted growing interest because they offer the potential for improved safety and higher energy density compared with conventional liquid-electrolyte systems.
Despite these advantages, the commercialization of solid-state batteries remains limited by low ionic conductivity and poor interfacial compatibility between different material components. To address these challenges, researchers have pursued rational materials design and interface engineering strategies. Fundamental studies have also been carried out to clarify Li-ion transport mechanisms in inorganic ceramic electrolytes and to understand synergistic interfacial chemical interactions in inorganic–organic composite electrolytes. Through the combination of mechanistic understanding and targeted materials design, key properties such as Li-ion transport pathways, transport mechanisms, electrochemical stability windows, and Li-ion transference numbers have been progressively improved.
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