Abstract
This work applies in situ Auger electron spectroscopy and X-ray photoelectron spectroscopy to the study of surface redox on LiNi1/3Mn1/3Co1/3O2 during charging and overcharging. We observe that all three transition metals are surface redox active, and that oxygen oxidation occurs for voltages above ≈4.2 V O2 loss above ≈4.7 V, mediated by carbon redox, leads to partial reduction of the transition metals at the surface during overcharging.
Original language | English (US) |
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Pages (from-to) | 197-204 |
Number of pages | 8 |
Journal | Electrochimica Acta |
Volume | 277 |
DOIs | |
State | Published - Jul 1 2018 |
Keywords
- In situ AES
- In situ XPS
- Li-ion battery
- LiNiMnCoO
ASJC Scopus subject areas
- General Chemical Engineering
- Electrochemistry