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Synthesis and conductivity studies of Li1.5Al0.5Ge1.5(PO4)3 solid electrolyte

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Inorganic Materials Aims and scope

Abstract

This paper describes the preparation of a lithium ion conducting solid electrolyte with the composition Li1.5Al0.5Ge1.5(PO4)3 by a new liquid-phase method with the use of the water-soluble salts Al(NO3)3 · 9H2O, LiNO3 · 3H2O, and (NH4)2HPO4 and the germano-oxalic acid H2[Ge(C2O4)3]. The synthesized materials have been characterized by X-ray diffraction, differential scanning calorimetry, thermogravimetry, and impedance spectroscopy. The results demonstrate that sintering of the synthesized amorphous powders at a temperature of 650°C leads to the formation of phase-pure Li1.5Al0.5Ge1.5(PO4)3. The ionic conductivity of the electrolyte measured at frequencies from 10 Hz to 2 MHz using pellets with an 86% relative density was 4.2 × 10–4 S/cm.

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Authors and Affiliations

  1. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center, Russian Academy of Sciences, Akademgorodok 26a, Apatity, Murmansk oblast, 184209, Russia

    G. B. Kunshina, I. V. Bocharova & E. P. Lokshin

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  1. G. B. Kunshina
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  2. I. V. Bocharova
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  3. E. P. Lokshin
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Correspondence to G. B. Kunshina.

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Original Russian Text © G.B. Kunshina, I.V. Bocharova, E.P. Lokshin, 2016, published in Neorganicheskie Materialy, 2016, Vol. 52, No. 3, pp. 320–326.

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Kunshina, G.B., Bocharova, I.V. & Lokshin, E.P. Synthesis and conductivity studies of Li1.5Al0.5Ge1.5(PO4)3 solid electrolyte. Inorg Mater 52, 279–284 (2016). https://doi.org/10.1134/S0020168516030080

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  • DOI: https://doi.org/10.1134/S0020168516030080

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