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Novel Mg-ion conductive oxide of μ-cordierite Mg0.6Al1.2Si1.8O6.

Novel Mg-ion conductive oxide of μ-cordierite Mg0.6Al1.2Si1.8O6.

Authors :
Takeda, Hayami
Nakano, Koki
Tanibata, Naoto
Nakayama, Masanobu
Source :
Science & Technology of Advanced Materials. Dec2020, Vol. 21 Issue 1, p131-138. 8p.
Publication Year :
2020

Abstract

Solid electrolytes with high Mg-ion conductivity are required to develop solid-state Mg-ion batteries. The migration energies of the Mg2+ ions of 5,576 Mg compounds tabulated from the inorganic crystal structure database (ICSD) were evaluated via high-throughput calculations. Among the computational results, we focused on the Mg2+ ion diffusion in Mg0.6Al1.2 Si1.8O6, as this material showed a relatively low migration energy for Mg2+ and was composed solely of ubiquitous elements. Furthermore, first-principles molecular dynamics calculations confirmed a single-phase Mg2+ ion conductor. The bulk material with a single Mg0.6Al1.2Si1.8O6 phase was successfully prepared using the sol-gel method. The relative density of the sample was 81%. AC impedance measurements indicated an electrical conductivity of 1.6 × 10−6 Scm−1 at 500°C. The activation energy was 1.32 eV, which is comparable to that of monoclinic-type Mg0.5Zr2(PO4)3. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14686996
Volume :
21
Issue :
1
Database :
Academic Search Index
Journal :
Science & Technology of Advanced Materials
Publication Type :
Academic Journal
Accession number :
148654114
Full Text :
https://doi.org/10.1080/14686996.2020.1730237