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High-energy-density halide and sulfide-based solid-state batteries: Interface engineering and performance optimization
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DOI：10.1016/j.mser.2026.101235.png)
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Abstract
En 中文
Substituting conventional liquid electrolytes with solid-state electrolytes (SSEs) alternatives effectively addresses safety concerns associated with the flammability of liquid electrolytes, while also improving the overall energy density of batteries. In recent years, halide and sulfide-based SSEs have attracted significant attention from researchers owing to their impressive ionic conductivity. Nevertheless, understanding the interfacial evolution mechanisms in these systems remains more challenging compared to their liquid counterparts. To address this, an optimized intrinsic anode-electrolyte-cathode architecture, incorporating dual interfacial modification layers, is essential for mitigating side reactions and Lithium dendrite growth. This review provides a comprehensive analysis of the obstacles hindering the commercialization of high-energy sulfide/halide all-solid-state batteries (ASSLBs), focusing on intrinsic electrolyte problems and the interfacial compatibility between cathode and anode materials. Based on this, we have proposed strategies to enhance the stability of the interface from the perspectives of electrolyte structure design and interface engineering, laying the foundation for the integrated design of high-energy all-solid-state pouch cells. Furthermore, this review elucidates the fundamental principles underlying both in-situ and ex-situ characterization methods, offering a systematic evaluation of their effectiveness in analyzing material physicochemical properties and monitoring interface dynamics, etc. Furthermore, an innovative approach to the design of high-entropy alloys (HEA) utilizing machine learning for ISE-based ASSLBs interface engineering was proposed. Such insights are pivotal for advancing solid-state battery technology and will continue to inform material and interface design to achieve practical performance.
Keywords:
solid-state electrolytes
interfacial engineering
high-energy-density batteries
halide-based SSEs
sulfide-based SSEs
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