Oxygen Vacancy Evolution at Li <sub> <i>x</i> </sub> V <sub>2</sub> O <sub>5</sub> /LiPON Solid State Electrochemical Interfaces Using Depth Resolved Cathodoluminescence Spectroscopy
half-cell, showing oxygen vacancy signal increasing and moving deeper into the electrode with increased cycle number. Significant electrochemical irreversibility was also observed, with poor Coulombic efficiency and a 15% drop in capacity over 50 cycles. Theoretical simulations predict that the presence of oxygen vacancies increases the energy barrier for lithium diffusion significantly, indicating that this aggregation of oxygen vacancies could be another battery degradation mechanism accompanying lithiation induced phase changes.
Authors
- L. J. Brillson (ORCID: https://orcid.org/0000-0003-3527-9761)
- Yue Qi (ORCID: https://orcid.org/0000-0001-5331-1193)
- Leopoldo Tapia-Aracayo
- Daniel Halbing
- Gregory Pustorino
Institutions
- John Brown University (US)
- Institute of Electronics (BG)
- The Ohio State University (US)
- University of Maryland, College Park (US)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2026-04-17
- DOI
- https://doi.org/10.1021/acsami.5c25104
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy
- Basic Energy Sciences