Abstract
Solid lithium electrolytes in the Li4-3x Fe x GeO4 system were synthesized. Their phase composition, thermal behavior, and electrical conductivity were studied in the temperature interval 300–750°C. Introduction of Fe3+ ions into lithium orthogermanate leads to the formation of a γ-Li3PO4-type structure and to a sharp increase in the conductivity, with a maximum reached at x = 0.075–0.15: about 10−1 S cm−1 at 300°C and more than 1 S cm−1 at 700°C. The main current carriers are interstitial Li+ cations weakly bound with the rigid framework. Owing to high conductivity, the electrolytes studied are of interest for use in high-temperature electrochemical devices.
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Original Russian Text © E.I. Burmakin, G.Sh. Shekhtman, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 8, pp. 1255–1260.
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Burmakin, E.I., Shekhtman, G.S. Solid lithium electrolytes based on Fe3+-modified lithium orthogermanate. Russ J Appl Chem 86, 1230–1234 (2013). https://doi.org/10.1134/S1070427213080132
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DOI: https://doi.org/10.1134/S1070427213080132