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.
|Number of pages||8|
|Publication status||Published - 2004|
|Event||205th Electrochemical Society Fall Meeting - Orlando, FL, United States|
Duration: Oct 12 2003 → Oct 16 2003
|Conference||205th Electrochemical Society Fall Meeting|
|Period||10/12/03 → 10/16/03|
All Science Journal Classification (ASJC) codes