Potassium ion conductivity in mixed gallate-ferrite solid electrolytes

New potassium solid electrolytes in the mixed gallate-ferrite systems K_0.85Pb_0.75(Ga_1-xFe_x)O₂ and K_1.85(Ga_1-xFe_x)_1.925V_0.75O₄ 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. Conductivities at the intermediate ranges of «x» have rather high values (> 10^-2 Cm·sm^-1 at 50°C, > 1 Cm·sm^-1 at 70°C), this allowes to optimize the composition of solid electrolytes at the relation of conductivity/stability properties.

Authors:

Burmakin Evgenii Iraklievich, Institute of high-temperature Electrochemistry UB of RAS, 20, Akademicheskaya St., Yekaterinburg, 620990, burmakin@ihte.uran.ru

Nechaev Grigorii Viktorovich, Institute of high-temperature Electrochemistry UB of RAS, 20, Akademicheskaya St., Yekaterinburg, 620990, N_gregory@mail.ru

Shekhtman Georgii Shaevich, Institute of high-temperature Electrochemistry UB of RAS, 20, Akademicheskaya St., Yekaterinburg, 620990, shekhtman@ihte.uran.ru

Key words:

solid electrolytes, potassium ion conductivity, potassium monogallate, potassium monoferrite, Pb and V additives

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Journal issue:

2014. Т. 14, № 1,

Heading:

Electrolytes for sources of electrochemical power

DOI:

https://doi.org/10.18500/1608-4039-2014-14-1-35-39

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