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DC Field | Value | Language |
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dc.citation.number | 34 | - |
dc.citation.startPage | 2001944 | - |
dc.citation.title | ADVANCED MATERIALS | - |
dc.citation.volume | 32 | - |
dc.contributor.author | Hwang, Jaeseong | - |
dc.contributor.author | Myeong, Seungjun | - |
dc.contributor.author | Jin, Wooyoung | - |
dc.contributor.author | Jang, Haeseong | - |
dc.contributor.author | Nam, Gyutae | - |
dc.contributor.author | Yoon, Moonsu | - |
dc.contributor.author | Kim, Su Hwan | - |
dc.contributor.author | Joo, Se Hun | - |
dc.contributor.author | Kwak, Sang Kyu | - |
dc.contributor.author | Kim, Min Gyu | - |
dc.contributor.author | Cho, Jaephil | - |
dc.date.accessioned | 2023-12-21T17:09:20Z | - |
dc.date.available | 2023-12-21T17:09:20Z | - |
dc.date.created | 2020-09-16 | - |
dc.date.issued | 2020-08 | - |
dc.description.abstract | Li- and Mn-rich layered oxides (LMRs) have emerged as practically feasible cathode materials for high-energy-density Li-ion batteries due to their extra anionic redox behavior and market competitiveness. However, sluggish kinetics regions (<3.5 V vs Li/Li+) associated with anionic redox chemistry engender LMRs with chemical irreversibility (first-cycle irreversibility, poor rate properties, voltage fading), which limits their practical use. Herein, the structural origin of this chemical irreversibility is revealed through a comparative study involving Li(1.15)Mn(0.51)Co(0.17)Ni(0.17)O(2)with relatively localized and delocalized excess-Li in its lattice system. Operando fine-interval X-ray absorption spectroscopy is used to simultaneously observe the interplay between transition-metal-oxygen (TM-O) redox chemistry and TM migration behavior in real time. Density functional theory calculations show that excess-Li localization in the LMR structure attenuates TM-O covalency and stability, leading to overall chemical irreversibility. Hence, the delocalized excess-Li system is proposed as an alternative design for practically feasible LMR cathodes with restrained TM migration and sustainable O-redox chemistry. | - |
dc.identifier.bibliographicCitation | ADVANCED MATERIALS, v.32, no.34, pp.2001944 | - |
dc.identifier.doi | 10.1002/adma.202001944 | - |
dc.identifier.issn | 0935-9648 | - |
dc.identifier.scopusid | 2-s2.0-85087745802 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/48600 | - |
dc.identifier.url | https://onlinelibrary.wiley.com/doi/full/10.1002/adma.202001944 | - |
dc.identifier.wosid | 000565471900025 | - |
dc.language | 영어 | - |
dc.publisher | WILEY-V C H VERLAG GMBH | - |
dc.title | Excess-Li Localization Triggers Chemical Irreversibility in Li- and Mn-Rich Layered Oxides | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter | - |
dc.relation.journalResearchArea | Chemistry; Science & Technology - Other Topics; Materials Science; Physics | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | chemical irreversibility | - |
dc.subject.keywordAuthor | excess-Li localization | - |
dc.subject.keywordAuthor | Li- and Mn-rich layered oxide | - |
dc.subject.keywordAuthor | lithium-ion batteries | - |
dc.subject.keywordAuthor | oxygen stability | - |
dc.subject.keywordPlus | LI1.2NI0.2MN0.6O2 | - |
dc.subject.keywordPlus | CHALLENGES | - |
dc.subject.keywordPlus | ANIONIC REDOX ACTIVITY | - |
dc.subject.keywordPlus | CATHODE MATERIALS | - |
dc.subject.keywordPlus | PHASE-TRANSFORMATION | - |
dc.subject.keywordPlus | METAL-OXIDES | - |
dc.subject.keywordPlus | SPINEL PHASE | - |
dc.subject.keywordPlus | LITHIUM | - |
dc.subject.keywordPlus | BATTERY | - |
dc.subject.keywordPlus | LI2MNO3 | - |
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