2021年
Charge-discharge properties and reaction mechanism of cation-disordered rutile-type Li1.2MnFe1.2F6.8
Electrochimica Acta
- ,
- ,
- ,
- 巻
- 405
- 号
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.electacta.2021.139627
- 出版者・発行元
- PERGAMON-ELSEVIER SCIENCE LTD
A carbon-coated Li1.2MnFe1.2F6.8 with a cation-disordered rutile structure is presented for the first time as a positive electrode material for lithium-ion batteries. For improved performance, the composite electrode is investigated at 90 degrees C using a thermally stable ionic liquid electrolyte. A combination of synchrotron X-ray diffraction, X-ray photoelectron spectroscopy and half-cell tests establish that the reversible extraction/insertion of lithium from/into Li1.2MnFe1.2F6.8 in the 2.5-4.5 V voltage range at 90 degrees C involves Fe(III)/Fe(II) and Mn(III)/Mn(II) redox reactions alongside partial conversion reactions between the rutile Li1.2MnFe1.2F6.8 and a mixture of LiF and rutile FeF2. Deep discharge to 2.0 V involves a conversion reaction to LiF and metallic Fe and Mn accompanied by the partial preservation of the rutile structure.(c) 2021 The Author(s). Published by Elsevier Ltd.
- リンク情報
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- DOI
- https://doi.org/10.1016/j.electacta.2021.139627
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000780566200003&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?eid=2-s2.0-85120156066&partnerID=MN8TOARS
- ID情報
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- DOI : 10.1016/j.electacta.2021.139627
- ISSN : 0013-4686
- eISSN : 1873-3859
- ORCIDのPut Code : 106751060
- SCOPUS ID : 85120156066
- Web of Science ID : WOS:000780566200003