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Coupling structural evolution and oxygen-redox electrochemistry in layered transition metal oxidesHighly Cited Paper

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Title
Coupling structural evolution and oxygen-redox electrochemistry in layered transition metal oxides
Author(s)
Donggun Eum; Byunghoon Kim; Song, Jun-Hyuk; Park, Hyeokjun; Jang, Ho-Young; Kim, Sung Joo; Cho, Sung-Pyo; Myeong Hwan Lee; Heo, Jae Hoon; Park, Jaehyun; Ko, Youngmin; Park, Sung Kwan; Kim, Jinsoo; Kyungbae Oh; Do-Hoon Kim; Kang, Seok Ju; Kisuk Kang
Publication Date
2022-06
Journal
Nature Materials, v.21, no.6, pp.664 - 672
Publisher
Nature Research
Abstract
© 2022, The Author(s), under exclusive licence to Springer Nature Limited.Lattice oxygen redox offers an unexplored way to access superior electrochemical properties of transition metal oxides (TMOs) for rechargeable batteries. However, the reaction is often accompanied by unfavourable structural transformations and persistent electrochemical degradation, thereby precluding the practical application of this strategy. Here we explore the close interplay between the local structural change and oxygen electrochemistry during short- and long-term battery operation for layered TMOs. The substantially distinct evolution of the oxygen-redox activity and reversibility are demonstrated to stem from the different cation-migration mechanisms during the dynamic de/intercalation process. We show that the π stabilization on the oxygen oxidation initially aids in the reversibility of the oxygen redox and is predominant in the absence of cation migrations; however, the π-interacting oxygen is gradually replaced by σ-interacting oxygen that triggers the formation of O–O dimers and structural destabilization as cycling progresses. More importantly, it is revealed that the distinct cation-migration paths available in the layered TMOs govern the conversion kinetics from π to σ interactions. These findings constitute a step forward in unravelling the correlation between the local structural evolution and the reversibility of oxygen electrochemistry and provide guidance for further development of oxygen-redox layered electrode materials.
URI
https://pr.ibs.re.kr/handle/8788114/12934
DOI
10.1038/s41563-022-01209-1
ISSN
1476-1122
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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