Surface redox on Li[Ni1/3Mn1/3Co1/3]O2 characterized by in situ X-ray photoelectron spectroscopy and in situ Auger electron spectroscopy. (1st July 2018)

• Record Type: Journal Article
• Authors: Tang, Ching-Yen; Feng, Lin; Haasch, Richard T.; Dillon, Shen J.
• Is Part Of: Electrochimica acta. Volume 277(2018)
• Page Start: 197
• Page End: 204
• Publication Date: 2018-07-01
• Subjects: LiNi1/3Mn1/3Co1/3O2 -- In situ AES -- In situ XPS -- Li-ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.04.199
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: This work applies in situ Auger electron spectroscopy and X-ray photoelectron spectroscopy to the study of surface redox on LiNi1/3 Mn1/3 Co1/3 O2 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.