Surface redox on Li[Ni1/3Mn1/3Co1/3]O2 characterized by in situ X-ray photoelectron spectroscopy and in situ Auger electron spectroscopy

Ching Yen Tang, Lin Feng, Richard T. Haasch, Shen J. Dillon

Research output: Contribution to journalArticlepeer-review

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 languageEnglish (US)
Pages (from-to)197-204
Number of pages8
JournalElectrochimica Acta
Volume277
DOIs
StatePublished - Jul 1 2018

Keywords

  • In situ AES
  • In situ XPS
  • Li-ion battery
  • LiNiMnCoO

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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