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Synthesis and Study of Conductivity of Al-Substituted Li7La3Zr2O12

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Abstract

The method of solid-phase sintering was used to synthesize samples of lithium-conducting Li6.4Al0.2La3Zr2O12 solid electrolyte with a garnet structure. Higher technological efficiency of the method of synthesis was achieved owing to using low-melting nitrate crystalline hydrates of ZrO(NO3)2 · 2H2O and La(NO3)3 · 6H2O as initial substances: formation of the melt considerably intensified the interaction, caused a decrease in the duration and energy consumption of the method, and provided the presence of only a single phase of powdered solid electrolyte with a high Li-ion conductivity. The excess of the lithium-containing component (Li2CO3) in the mix was varied to compensate lithium losses in the course of the high-temperature treatment. Specific ionic conductivity of Li6.4Al0.2La3Zr2O12 was determined using the impedance spectroscopy technique and was 2 × 10–4 S/cm at the room temperature.

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Authors and Affiliations

  1. Tananaev Institute of Chemistry, Subdivision of Federal Research Center “Kola Scientific Center, Russian Academy of Sciences”, 184209, Apatity, Murmansk oblast, Russia

    G. B. Kunshina, V. I. Ivanenko & I. V. Bocharova

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  1. G. B. Kunshina
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  2. V. I. Ivanenko
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  3. I. V. Bocharova
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Correspondence to G. B. Kunshina.

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Translated by M. Ehrenburg

Based on the paper presented at the XIV Meeting “Fundamental Problems of Solid State Ionics,” Chernogolovka (Russia), September 9–13, 2018.

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Kunshina, G.B., Ivanenko, V.I. & Bocharova, I.V. Synthesis and Study of Conductivity of Al-Substituted Li7La3Zr2O12. Russ J Electrochem 55, 558–564 (2019). https://doi.org/10.1134/S1023193519060132

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  • DOI: https://doi.org/10.1134/S1023193519060132

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