論文

査読有り
2021年

Charge-discharge properties and reaction mechanism of cation-disordered rutile-type Li1.2MnFe1.2F6.8

Electrochimica Acta
  • Zheng, Y.
  • ,
  • Hwang, J.
  • ,
  • Matsumoto, K.
  • ,
  • Hagiwara, R.

405
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
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
  • 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

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