All-solid-state batteries (ASSBs) have emerged as a promising alternative to traditional Li-ion batteries, primarily due to their potential for higher energy density and enhanced safety features. At the heart of high-performance ASSBs lie solid-state electrolytes (SSEs), which have been the subject of intensive research in recent decades. SSEs generally fall into three main categories: inorganic SSEs (comprising oxides, sulfides, halides, etc.), organic polymer SSEs (such as the widely studied poly(ethylene) oxide electrolytes), and hybrid variants. The performance of these SSEs, encompassing factors like ionic conductivity, structural stability, compatibility with electrodes, and mechanical properties, plays a pivotal role in the realization and deployment of solid-state batteries.

Conducting research in this area promises to yield profound insights into the design and application of solid electrolytes that exhibit high ionic conductivity, compatibility with electrodes, air stability, and processability simultaneously. Advancements in solid electrolyte technology have the potential to significantly enhance the performance of all-solid-state batteries, thereby further improving upon the energy density and safety compared to conventional lithium-ion batteries that rely on liquid electrolytes.

In this special issue, we are calling for the most recent research on the SSEs, from the synthesis, structure, characterizations to the performance. We aim to provide the research community with the timely progress report and stimulate the development of ASSBs.

Potential topics include, but are not limited to:

· Oxide solid electrolytes
· Sulfide solid electrolytes
· Halide solid electrolytes
· Hydroborate solid electrolytes
· Polymer solid electrolytes
· Structural manipulation of solid electrolytes
· Ion migration mechanism in solids
· Mass scale production of solid electrolytes
· Electrode compatibility with solid electrolytes
· Interface modifications
· Chemo-mechanical stability
· Advanced characterizations

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Frontiers in Materials

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