Probing dynamic degradation and mass transport in solid-state sodium-ion batteries using operando simultaneous dual-polarity SIMS
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Operando investigation of a solid-state battery is challenging due to sample conditions, such as electrode roughness and sensitivity to the atmosphere. In this work, we present an operando technique that combines electrochemistry with the simultaneous detection of secondary ions in a Hi-5 Secondary Ion Mass Spectrometer (SIMS). Sodium metal|NASICON solid electrolyte interfaces were formed through cycling at different current densities in a 1 μm2 region, where the critical current density was found to be 0.04 μA μm−2. Electrochemical Impedance Spectroscopy (EIS) determined that a solid electrolyte interphase (SEI), resistive to sodium-ion migration, formed at each sodium metal|NASICON interface. Dynamic dual-polarity SIMS identified the SEI to be composed of oxide species that formed along the sodium mass transport columns and degraded the grain boundaries, leading to dendrite formation at the sodium metal|NASICON interfaces. This work pioneers a new diagnostic tool, propelling interfacial and solid electrolyte engineering solutions to mitigate device failure, allowing the development of next-generation solid-state batteries.
Date Issued
2025-08-01
Date Acceptance
2025-06-06
Citation
EES Batteries, 2025, 1 (4), pp.964-974
ISSN
3033-4071
Publisher
Royal Society of Chemistry
Start Page
964
End Page
974
Journal / Book Title
EES Batteries
Volume
1
Issue
4
Copyright Statement
© 2025 The Author(s). Published by the Royal Society of Chemistry. This article is licensed under aCreative Commons Attribution 3.0 Unported Licence 9https://creativecommons.org/licenses/by/3.0/)
License URL
Identifier
10.1039/d5eb00071h
Publication Status
Published
Date Publish Online
2025-06-11