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Multiscale interfacial engineering of halide electrolytes for high-performance all-solid-state lithium batteries
Jialiang Zhu, Yuan Zhong, Bingqing Xu*, and Gen Zhang*
https://doi.org/10.1016/j.cjsc.2025.100850
ABSTRACT
Halide solid electrolytes for all-solid-state lithium batteries have garnered significant research interest from academia and industry, owing to their intrinsic high safety, satisfying ionic conductivity, wide electrochemical window, and favorable mechanical properties. However, interfacial instability at the whole battery system level remains a critical challenge hindering their practical implementation at a large scale. Rational electrolytes designs and explorations require a coherent perspective to address the interface problems with systematic discussions on improvement strategies. This review provides a systematic examination of interfacial engineering across multiple scales, bridging fundamental material properties, electrode-electrolyte interfaces, multi-component composite structures, and scalable manufacturing. With a particular emphasis on the complex interactions at halide solid electrolyte interfaces, we discuss innovative strategies to enhance interfacial stability of electrode/electrolyte. This review aims to deepen the fundamental understanding of interfacial chemistry and accelerate the development of halide-based all-solid-state lithium batteries, thereby facilitating their deployment in next-generation energy storage systems.
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