Li5FeO4 and its analogues as electrode of lithium ion batteries

N. Imanishi, A. Hirano, M. Ishihara, M. Ueda, Y. Takeda, H. Sakaebe, M. Tabuchi, Aist Kansai

Research output: Contribution to conferencePaperpeer-review

Abstract

The anti-fluorite type materials, Li5FeO4 were prepared and studied as a cathode for lithium secondary battery. 1.2 equivalent lithium was deintercalated from Li5FeO4 and reversibly intercalated, which corresponds to the capacity of 200mAh/g in Li/Li 5FeO4 cell(4V-2V). In the first charge, the structure changes to amorphous-like phase which dominates in the following cycles. In the initial few cycles, the discharge capacity was lower than the charged capacity and the efficiency became 100% after the fifth cycle. The Mössbauer effect measurement shows that the valence state of oxidized iron did not coincide with the charge transferred in the Li/Li5FeO4 cell. The participation of electrons belonging to oxide ions was suggested.

Original languageEnglish
Pages214-221
Number of pages8
Publication statusPublished - 2004
Externally publishedYes
Event205th Electrochemical Society Fall Meeting - Orlando, FL, United States
Duration: Oct 12 2003Oct 16 2003

Conference

Conference205th Electrochemical Society Fall Meeting
Country/TerritoryUnited States
CityOrlando, FL
Period10/12/0310/16/03

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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