Please use this identifier to cite or link to this item:
|Title:||Mixed oxides Ca2Fe2O5 and Ca 2Co2O5 as anode materials for Li-ion batteries|
|Authors:||Sharma, N. |
Subba Rao, G.V.
|Citation:||Sharma, N., Shaju, K.M., Subba Rao, G.V., Chowdari, B.V.R. (2004-03-15). Mixed oxides Ca2Fe2O5 and Ca 2Co2O5 as anode materials for Li-ion batteries. Electrochimica Acta 49 (7) : 1035-1043. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2003.10.014|
|Abstract:||The electrochemical performance of mixed oxides, Ca2Fe 2O5 and Ca2Co2O5 for use in Li-ion batteries was studied with Li as the counter electrode. The compounds were prepared and characterized by X-ray diffraction and SEM. Ca 2Fe2O5 showed a reversible capacity of 226 mAh/g at the 14th cycle and retained 183 mAh/g at the end of 50 cycles at 60 mA/g in the voltage window 0.005-2.5 V. A reversible capacity in the range, 365-380 mAh/g, which is stable up to 50 charge-discharge cycles is exhibited by Ca2Co2O5 in the voltage window, 0.005-3.0 V and at 60 mA/g. This corresponds to recycleable moles of Li of 3.9 ± 0.1 (theoretical: 4.0). Significant improvement in the cycling performance and attainable reversible capacity were noted for Ca2Co2O 5 on cycling to an upper cut-off voltage of 3.0 V as compared to 2.5 V. Coulombic efficiency for both compounds is >98%. Electrochemical impedance spectroscopy (EIS) data clearly indicate the reversible formation/decomposition of polymeric surface film on the electrode surface of Ca2Co2O5 in the voltage window, 0.005-3.0 V. Cyclic voltammetry results compliment the galvanostatic cycling data. © 2003 Published by elsevier Ltd.|
|Source Title:||Electrochimica Acta|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 21, 2018
WEB OF SCIENCETM
checked on Jun 11, 2018
checked on Jul 6, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.