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Choi, Nam-Soon
Energy Materials Lab.
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dc.citation.startPage 3285 -
dc.citation.title NATURE COMMUNICATIONS -
dc.citation.volume 9 - Myeong, Seungjun - Cho, Woongrae - Jin, Wooyoung - Hwang, Jaeseong - Yoon, Moonsu - Yoo, Youngshin - Nam, Gyutae - Jang, Haeseong - Han, Jung-Gu - Choi, Nam-Soon - Kim, Min Gyu - Cho, Jaephil - 2023-12-21T20:19:59Z - 2023-12-21T20:19:59Z - 2018-08-30 - 2018-08 -
dc.description.abstract Lithium-excess 3d-transition-metal layered oxides (Li1+xNiyCozMn1-x-y-zO2, > 250 mAh g(-1)) suffer from severe voltage decay upon cycling, which decreases energy density and hinders further research and development. Nevertheless, the lack of understanding on chemical and structural uniqueness of the material prevents the interpretation of internal degradation chemistry. Here, we discover a fundamental reason of the voltage decay phenomenon by comparing ordered and cation-disordered materials with a combination of X-ray absorption spectroscopy and transmission electron microscopy studies. The cation arrangement determines the transition metal-oxygen covalency and structural reversibility related to voltage decay. The identification of structural arrangement with de-lithiated oxygen-centred octahedron and interactions between octahedrons affecting the oxygen stability and transition metal mobility of layered oxide provides the insight into the degradation chemistry of cathode materials and a way to develop high-energy density electrodes. -
dc.identifier.bibliographicCitation NATURE COMMUNICATIONS, v.9, pp.3285 -
dc.identifier.doi 10.1038/s41467-018-05802-4 -
dc.identifier.issn 2041-1723 -
dc.identifier.scopusid 2-s2.0-85051636538 -
dc.identifier.uri -
dc.identifier.url -
dc.identifier.wosid 000441768300016 -
dc.language 영어 -
dc.title Understanding voltage decay in lithium-excess layered cathode materials through oxygen-centred structural arrangement -
dc.type Article -
dc.description.isOpenAccess TRUE -
dc.relation.journalWebOfScienceCategory Multidisciplinary Sciences -
dc.relation.journalResearchArea Science & Technology - Other Topics -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordPlus LI-ION BATTERIES -
dc.subject.keywordPlus ATOMIC-STRUCTURE -
dc.subject.keywordPlus PHASE-TRANSFORMATION -
dc.subject.keywordPlus CHARGE-COMPENSATION -
dc.subject.keywordPlus ELECTRON-MICROSCOPY -
dc.subject.keywordPlus COMPOSITE CATHODE -
dc.subject.keywordPlus OXIDE ELECTRODES -
dc.subject.keywordPlus SPINEL PHASE -
dc.subject.keywordPlus NI -
dc.subject.keywordPlus INTERCALATION -


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