Charge-discharge processes in solid electrolyte heterostructures Ag7–x(Ge1–xPₓ)S5I for electrochemical energy devices
Abstract
Charge–discharge processes in solid electrolyte heterostructures Ag|Ag7x(Ge1xPx)S5I|Se with different Ge/P ratios were investigated. Heterovalent substitution of Ge4+ by P5+ significantly affects ionic conductivity, relaxation time, and polarization at interfaces. Using galvanostatic cycling and current–voltage measurements, dependences of U(t) on composition and cycle number were obtained. Diffusion coefficients, Ag+ mobility, ionic resistance and transference numbers (tion 0.994–0.999) confirm predominantly ionic transport. Asymmetry of charge accumulation and release is related to Ag2Se phase formation and interfacial polarization. The studied materials demonstrate high ionic conductivity and stability, making them promising for solid-state electrochemical devices.
Fields of Study & Subjects
Advanced Thermoelectric Materials and Devices
Phase-change materials and chalcogenides
Advanced Battery Materials and Technologies
Publication details
- Journal / source
- Semiconductor Physics Quantum Electronics & Optoelectronics
- Publisher
- National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications)
- Volume
- 29
- Issue
- 01
- Pages
- 066–079
- Publication date
- 25 March 2026