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dc.contributor.author | Zheng, Yayun | en |
dc.contributor.author | Tawa, Shinya | en |
dc.contributor.author | Hwang, Jinkwang | en |
dc.contributor.author | Orikasa, Yuki | en |
dc.contributor.author | Matsumoto, Kazuhiko | en |
dc.contributor.author | Hagiwara, Rika | en |
dc.contributor.alternative | 鄭, 亞雲 | ja |
dc.contributor.alternative | 田和, 慎也 | ja |
dc.contributor.alternative | 黄, 珍光 | ja |
dc.contributor.alternative | 松本, 一彦 | ja |
dc.contributor.alternative | 萩原, 理加 | ja |
dc.date.accessioned | 2021-09-30T08:18:30Z | - |
dc.date.available | 2021-09-30T08:18:30Z | - |
dc.date.issued | 2021-02 | - |
dc.identifier.uri | http://hdl.handle.net/2433/265329 | - |
dc.description.abstract | Extensive studies on trirutile Li₀.₅FeF₃ phase have been commissioned in the context of the Li–Fe–F system for Li-ion batteries. However, progress in electrochemical and structural studies has been greatly encumbered by the low electrochemical reactivity of this material. In order to advance this class of materials, a comprehensive study into the mechanisms of this phase is necessary. Therefore, herein, we report for the first time overall reaction mechanisms of ordered trirutile Li₀.₅FeF₃ at elevated temperatures of 90 °C with the aid of a thermally stable ionic liquid electrolyte. Ordered trirutile Li₀.₅FeF₃ is prepared by high-energy ball milling combined with heat treatment followed by electrochemical tests, X-ray diffraction, and X-ray absorption spectroscopic analyses. Our results reveal that a reversible topotactic Li⁺ extraction/insertion from/into the trirutile structure occurs in a two-phase reaction with a minor volume change (1.09% between Li₀.₅FeF₃ and Li₀.₁₁FeF₃) in the voltage range of 3.2–4.3 V. The extension of the lower cutoff voltage to 2.5 V results in a conversion reaction to LiF and rutile FeF₂ during discharging. The subsequent charge triggers the formation of the disordered trirutile structure at 4.3 V without showing the reconversion from LiF and rutile FeF₂ to ordered trirutile Li₀.₅FeF₃ or FeF₃. | en |
dc.language.iso | eng | - |
dc.publisher | American Chemical Society (ACS) | en |
dc.rights | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.chemmater.0c03544. | en |
dc.rights | The full-text file will be made open to the public on 9 February 2022 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. | en |
dc.rights | This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 | en |
dc.subject | Electrodes | en |
dc.subject | Chemical structure | en |
dc.subject | Physical and chemical processes | en |
dc.subject | Electrolytes | en |
dc.subject | Materials | en |
dc.title | Phase Evolution of Trirutile Li₀.₅FeF₃ for Lithium-Ion Batteries | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | Chemistry of Materials | en |
dc.identifier.volume | 33 | - |
dc.identifier.issue | 3 | - |
dc.identifier.spage | 868 | - |
dc.identifier.epage | 880 | - |
dc.relation.doi | 10.1021/acs.chemmater.0c03544 | - |
dc.textversion | author | - |
dcterms.accessRights | open access | - |
datacite.date.available | 2022-02-09 | - |
datacite.awardNumber | 19H02811 | - |
datacite.awardNumber.uri | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19H02811/ | - |
dc.identifier.pissn | 0897-4756 | - |
jpcoar.funderName | 日本学術振興会 | ja |
jpcoar.awardTitle | イオン液体を電解質として用いる高温作動型リチウム二次電池 | ja |
出現コレクション: | 学術雑誌掲載論文等 |
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