Investigating the Li+ substructure and ionic transport in Li10GeP2−xSbxS12 (0 ≤ x ≤ 0.25)

Bianca Helm; Lara M. Gronych; Ananya Banik; Martin A. Lange; Cheng Li; Wolfgang G. Zeier

doi:10.1039/D2CP04710A

Investigating the Li⁺ substructure and ionic transport in Li₁₀GeP_2−xSb_xS₁₂ (0 ≤ x ≤ 0.25)†

Bianca Helm,^a Lara M. Gronych,^a Ananya Banik,^a Martin A. Lange,^a Cheng Li^b and Wolfgang G. Zeier

*^ac

Author affiliations

* Corresponding authors

^a Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstrasse 28/30, D-48149 Münster, Germany
E-mail: wzeier@uni-muenster.de

^b Neutron Scattering Division, Oak Ridge National Laboratory (ORNL), 1 Bethel Valley Road, Oak Ridge, Tennessee 37831-6473, USA

^c Institute für Energie-und Klimaforschung (IEK), IEK-12: Helmholtz-Institut Münster, Forschungszentrum Jülich, 48149 Münster, Germany

Abstract

Understanding the correlation between ionic motion and crystal structure is crucial for improving solid electrolyte conductivities. Several substitution series in the Li₁₀GeP₂S₁₂ structure have shown a favorable impact on the ionic conductivity, e.g. the replacement of P(+V) by Sb(+V) in Li₁₀GeP₂S₁₂. However, here the interplay between the structure and ionic motion remains elusive. X-Ray diffraction, high-resolution neutron diffraction, Raman spectroscopy and potentionstatic impedance spectroscopy are employed to explore the impact of Sb(+V) on the Li₁₀GeP₂S₁₂ structure. The introduction of antimony elongates the unit cell in the c-direction and increases the M(1)/P(1) and Li(2) polyhedral volume. Over the solid solution range, the Li⁺ distribution remains similar, an inductive effect seems to be absent and the ionic conductivity is comparable for all compositions. The effect of introducing Sb(+V) in Li₁₀GeP₂S₁₂ cannot be corroborated.

Supplementary files

Article information

DOI: https://doi.org/10.1039/D2CP04710A
Article type: Paper
Submitted: 09 Oct 2022
Accepted: 01 Dec 2022
First published: 02 Dec 2022

Download Citation

Phys. Chem. Chem. Phys., 2023,25, 1169-1176

Author version available

Download author version (PDF)

Permissions

Request permissions

Investigating the Li⁺ substructure and ionic transport in Li₁₀GeP_2−xSb_xS₁₂ (0 ≤ x ≤ 0.25)

B. Helm, L. M. Gronych, A. Banik, M. A. Lange, C. Li and W. G. Zeier, Phys. Chem. Chem. Phys., 2023, 25, 1169 DOI: 10.1039/D2CP04710A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Physical Chemistry Chemical Physics