On the transport properties of K₂ZnV₂O₇
File(s)
Published online version
Author(s)
Curtis, Esther
Huang, kehan
Auckett, Josie
Skinner, Stephen
Evans, Ivana
Type
Journal Article
Abstract
K2ZnV2O7 has recently been reported as a promising oxide ion conductor. We have studied this material using a number of structure- and physical property-probing techniques. Our extensive characterisation using variable temperature synchrotron X-ray and neutron diffraction, impedance spectroscopy and tracer diffusion measurements of its transport properties, does not support the reports that K2ZnV2O7 undergoes partial reduction at high temperatures, leading to the creation of vacancies and oxide ion conductivity. In particular, the lack of oxide ion diffusion observed by isotope exchange definitively rules out oxide ion conductivity within K2ZnV2O7. Instead, we find that the high conductivity measured originates from the melting of a small amount of KVO3 impurity in the sample, which is detectable by synchrotron X-ray and neutron diffraction.
Date Issued
2026-01-06
Date Acceptance
2025-12-23
Citation
Journal of Materials Chemistry A, 2026
ISSN
2050-7488
Publisher
Royal Society of Chemistry
Journal / Book Title
Journal of Materials Chemistry A
Copyright Statement
© The Royal Society of Chemistry 2026. This article is licensed under aCreative Commons Attribution 3.0 Unported Licence (https://creativecommons.org/licenses/by/3.0/)
License URL
Identifier
10.1039/d5ta09854h
Publication Status
Published online
Date Publish Online
2026-01-06