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Rubidium ion conducting Rb2 − 2x Al2 − x A x O4 (A = Nb, Ta) solid electrolytes

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Abstract

Rb2 − 2x Al2 − x A x O4 (A = Nb, Ta) solid solutions have been synthesized, and their conductivity has been measured as a function of temperature and composition. The highest rubidium ion conductivity in the Rb2 − 2x Al2 − x A x O4 solid solutions is 3.16 × 10−3 S/cm at 300°C and ∼ 2 × 10−2 S/cm at 700°C. The high rubidium ion conductivity of the synthesized solid electrolytes is mainly due to the formation of rubidium vacancies when Nb5+ or Ta5+ substitutes for Al3+ and to the specific features of the crystal structure of RbAlO2.

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Authors and Affiliations

  1. Institute of High-Temperature Electrochemistry, Ural Division, Russian Academy of Sciences, ul. S. Kovalevskoi 20, Yekaterinburg, 620219, Russia

    G. Sh. Shekhtman, E. I. Volegova, E. I. Burmakin & B. D. Antonov

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  1. G. Sh. Shekhtman
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  2. E. I. Volegova
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  3. E. I. Burmakin
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  4. B. D. Antonov
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Correspondence to E. I. Burmakin.

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Original Russian Text © G.Sh. Shekhtman, E.I. Volegova, E.I. Burmakin, B.D. Antonov, 2010, published in Neorganicheskie Materialy, 2010, Vol. 46, No. 5, pp. 604–609.

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Shekhtman, G.S., Volegova, E.I., Burmakin, E.I. et al. Rubidium ion conducting Rb2 − 2x Al2 − x A x O4 (A = Nb, Ta) solid electrolytes. Inorg Mater 46, 534–539 (2010). https://doi.org/10.1134/S0020168510050171

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  • DOI: https://doi.org/10.1134/S0020168510050171

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