Open AccessProduction of Li1.5Al0.5Ge1.5(PO4)3 ionic conductor from liquid-phase precursors
Author(s) -
Г. Б. Куншина,
И. В. Бочарова,
В. И. Иваненко
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1347/1/012113
Subject(s) - oxalate , oxalic acid , dissolution , inorganic chemistry , citric acid , lithium (medication) , germanium , materials science , ionic conductivity , phase (matter) , electrolyte , chemistry , organic chemistry , silicon , medicine , electrode , metallurgy , endocrinology
The synthesis of lithium-conducting solid electrolyte Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) from liquid-phase precursors using available water-soluble salts (LiNO 3 ·3H 2 O, Al(NO 3 ) 3 ·9H 2 O, (NH 4 ) 2 HPO 4 ) and a stable citrate [Ge(C 6 H 5 O 7 ) 3 ] 5– or oxalate [Gе(С 2 О 4 ) 3 ] 2– germanium complex was studied. Germanium complexes were obtained by dissolving the hexagonal modification of GeO 2 in citric or oxalic acid. As a result of the transfer of all initial components to the solution with the formation of a true collective solution, the subsequent interaction proceeded with the formation of a single-phase LAGP product in one stage from an oxalate precursor at 650°C, from a citrate precursor — at 800°C. The synthesized LAGP was studied by XRD, TG-DSC, IR spectroscopy, chemical analysis and impedance spectroscopy. The total ionic conductivity at room temperature was 8·10 –4 S/cm and 2.5·10 –4 S/cm for LAGP synthesized from oxalate and citrate precursor respectively. LAGP synthesis from oxalate precursor is preferred over synthesis from citrate precursor.