Tracking Interphase Growth at Alloy Anode Interfaces in Sulfide Solid-State Batteries.

ABSTRACT: The chemical stability of solid-state electrolytes (SSEs) in contact with negative electrode materials is essential to enable high performance and safety of solid-state batteries (SSBs). While interphase layers are known to form between Li metal and various sulfide SSEs, there is a lack of understanding of interphase growth in contact with other promising anode materials, such as silicon and aluminum alloys. Here, we track and quantify interphase growth rate, thickness, and composition of various alloy anode thin films in contact with the widely used argyrodite Li₆PS₅Cl SSE. Using coulometric titration time analysis (CTTA), we find that the average interphase thickness on four alloy anode materials (Ag, Al, Si, and Ge) is less than half that of pure Li metal after 400

SUBMITTER: Jeong WJ 

PROVIDER: S-EPMC12814352 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature