Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
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Lithium-ion Conductors Prepared by Low-temperature Heat Treatment of Amorphous Materials with the Composition of High-Al Substituted Li1+xAlxGe2−x(PO4)3 (x = 1.0) for All-solid-state Batteries
Nana SHINADAToi SHIMODARyohei KURIHARAHideyuki MORIMOTO
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2025 年 93 巻 2 号 p. 027004

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Amorphous powder with the composition of high-Al substituted Li1+xAlxGe2−x(PO4)3 (x = 1.0) [LAGP(x = 1.0)] were prepared by mechanical milling treatment of the starting materials. Crystalline compounds with LiGe2(PO4)3-based NASICON-type structure were mainly formed by low-temperature heat treatment of amorphous LAGP(x = 1.0) at 450–750 °C. NASICON-type solid electrolytes prepared by the heat treatment of pelletized-type amorphous LAGP(x = 1.0) at 600–750 °C exhibited relatively high conductivities on the order of 10−5 S cm−1 at room temperature, although they contained AlPO4 and Li9Al3(P2O7)3(PO4)2 compounds. The LAGP-type high-Al solid electrolytes would be a potential candidate as lithium-ion conductors for all-solid-state battery applications.

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© The Author(s) 2024. Published by ECSJ.

This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium provided the original work is properly cited. [DOI: 10.5796/electrochemistry.24-00116].
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