Reversible Anionic Redox Activities in Conventional LiNi1/3Co1/3Mn1/3O2 Cathodes
- Authors
- Lee, Gi-Hyeok; Wu, Jinpeng; Kim, Duho; Cho, Kyeongjae; Cho, Maenghyo; Yang, Wanli; Kang, Yong-Mook
- Issue Date
- 25-5월-2020
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- electrochemistry; lithium-ion batteries; redox chemistry; resonant inelastic X-ray scattering; X-ray absorption spectroscopy
- Citation
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.59, no.22, pp.8681 - 8688
- Indexed
- SCIE
SCOPUS
- Journal Title
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
- Volume
- 59
- Number
- 22
- Start Page
- 8681
- End Page
- 8688
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/55642
- DOI
- 10.1002/anie.202001349
- ISSN
- 1433-7851
- Abstract
- Redox reactions of oxygen have been considered critical in controlling the electrochemical properties of lithium-excessive layered-oxide electrodes. However, conventional electrode materials without overlithiation remain the most practical. Typically, cationic redox reactions are believed to dominate the electrochemical processes in conventional electrodes. Herein, we show unambiguous evidence of reversible anionic redox reactions in LiNi1/3Co1/3Mn1/3O2. The typical involvement of oxygen through hybridization with transition metals is discussed, as well as the intrinsic oxygen redox process at high potentials, which is 75 % reversible during initial cycling and 63 % retained after 10 cycles. Our results clarify the reaction mechanism at high potentials in conventional layered electrodes involving both cationic and anionic reactions and indicate the potential of utilizing reversible oxygen redox reactions in conventional layered oxides for high-capacity lithium-ion batteries.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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