solid electrolytes

New potassium solid electrolytes in the mixed gallate-ferrite systems K0.85Pb0.75(Ga1−xFex)O2 and K1.85(Ga1−xFex)1.925V0.75O4 were synthesized and studied. In the both systems the monotonic increasing of conductivity with increasing of Fe3+ concentration takes place, anomalies as in the early investigated aluminate-ferrite systems does not fixed.

New potassium solid electrolytes in the systems K3-2xMxPO4 (M = Mg, Zn) were synthesized and studied. The introduction of Mg2+ and Zn2+ cations leads to sharp increasing of K3PO4 conductivity due to potassium vacancies formation and stabilization of high temperature cubic modification of orthophosphate. Maximum conductivity is observed at x ≈ 0.15–0.25 and is equal to (6–8)·10-2 S·cm-1 at 400°C, higher than 10-1 S·cm-1 at 700°C. The factors influencing on the transport properties of investigated electrolytes are discussed.