Issue 18, 2021

Correlated Li-ion migration in the superionic conductor Li10GeP2S12

Abstract

An all-solid-state Li-ion secondary battery is a promising device that provides a solution to existing energy problems. However, it remains far from practical application mainly because of the lack of our basic understanding of the conduction mechanism of Li ions in Li-rich superionic conductors used as solid electrolytes in place of liquid electrolytes for conventional batteries. Herein, we studied the crystalline compound Li10GeP2S12 with the largest Li-ion conductivity thus far via a novel route based on a combination of single-crystal neutron diffraction experiments at low temperature and first-principles calculations, and found that a correlated migration of the densely packed Li ions governs the overall Li-ion conduction. The correlated migration mechanism provides us with guidelines on how to design efficient superionic conductors for more efficient batteries.

Graphical abstract: Correlated Li-ion migration in the superionic conductor Li10GeP2S12

Supplementary files

Article information

Article type
Paper
Submitted
20 jan 2021
Accepted
07 apr 2021
First published
27 apr 2021

J. Mater. Chem. A, 2021,9, 11278-11284

Correlated Li-ion migration in the superionic conductor Li10GeP2S12

T. Yajima, Y. Hinuma, S. Hori, R. Iwasaki, R. Kanno, T. Ohhara, A. Nakao, K. Munakata and Z. Hiroi, J. Mater. Chem. A, 2021, 9, 11278 DOI: 10.1039/D1TA00552A

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