Recent Progress in High-Voltage Cathode/Sulfide Solid-state Electrolyte Interfaces: Failure Mechanisms, Stabilization, and Characterization

doi:10.15541/jim20260159

Abstract

Abstract: Sulfide solid-state electrolytes (SSEs) are one of the most promising electrolytes for all-solid-state batteries (ASSBs) due to their high ionic conductivity and excellent processability. However, their limited oxidative stability and poor interfacial compatibility with high-voltage cathodes cause severe interfacial degradation, restricting ASSBs’ cycling stability. This interfacial degradation process typically involves the coupling of multiple factors, including chemical/electrochemical instability, space-charge-layer effects, and the evolution of contact damage. On this basis, this review systematically analyzes interfacial reaction pathways, transport limitations, and structural evolution at cathode/sulfide SSE interfaces. Stabilization strategies, including interphase engineering, intrinsic regulation of sulfide SSEs, and interfacial charge redistribution, are further summarized. The critical role of multi-scale and in-situ characterization techniques in revealing the dynamic evolution of the interface is also highlighted. Integration of mechanistic insights, interfacial design principles and advanced characterization provides crucial guidance for stabilizing the high-voltage cathode/sulfide SSEs interface and promoting sulfide-based ASSBs toward practical applications.

Key words: all-solid-state battery, sulfide solid-state electrolyte, high-voltage cathode, interfacial stability, review

CLC Number:

TM911

LI Yue, REN Junchao, SHANG Kun, LU Hong, DING Fei. Recent Progress in High-Voltage Cathode/Sulfide Solid-state Electrolyte Interfaces: Failure Mechanisms, Stabilization, and Characterization[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20260159.

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