TY  - JOUR
T1  - Charge-discharge processes in solid electrolyte heterostructures Ag7x(Ge1xPx)S5I for electrochemical energy devices
AU  - Bilanych, V.S.
AU  - Slyvka, A.A.
AU  - Vorobiov, S.I.
AU  - Pogodin, A.I.
AU  - Malakhovska, T.O.
AU  - Mohylyuk, I.M.
AU  - Komanicky, V.
JO  - Semiconductor Physics, Quantum Electronics & Optoelectronics
VL  - 29
IS  - 1
SP  - 066
EP  - 079
PY  - 2026
DO  - 10.15407/spqeo29.01.066
UR  - https://doi.org/10.15407/spqeo29.01.066
AB  - 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.
KW  - superionic conductors
KW  - argyrodite structure
KW  - Ag7x(Ge1xPx)S5I
KW  - solid electrolyte heterostructures
KW  - Ag+ ion diffusion
KW  - charge-discharge processes
KW  - interfacial polarization
KW  - solid-state electrochemical devices.
ER  -