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 language | English |
---|---|
Pages | 214-221 |
Number of pages | 8 |
Publication status | Published - 2004 |
Externally published | Yes |
Event | 205th Electrochemical Society Fall Meeting - Orlando, FL, United States Duration: Oct 12 2003 → Oct 16 2003 |
Conference
Conference | 205th Electrochemical Society Fall Meeting |
---|---|
Country/Territory | United States |
City | Orlando, FL |
Period | 10/12/03 → 10/16/03 |
All Science Journal Classification (ASJC) codes
- Engineering(all)