Please use this identifier to cite or link to this item:
|Title:||Cathodic properties of (Al, Mg) co-doped LiNi0.7Co0.3O2|
Subba Rao, G.V.
|Source:||Madhavi, S., Subba Rao, G.V., Chowdari, B.V.R., Li, S.F.Y. (2002-12). Cathodic properties of (Al, Mg) co-doped LiNi0.7Co0.3O2. Solid State Ionics 152-153 : 199-205. ScholarBank@NUS Repository. https://doi.org/10.1016/S0167-2738(02)00301-6|
|Abstract:||Li(Ni0.7Co0.3)1-a-bAlaMgb O2 (a=0.00, 0.05 and a=0.05; b=0.02,0.05) compounds were synthesized and characterized by X-ray diffraction (XRD). Their cathodic behavior in coin cells with Li-metal anode and liquid electrolyte was studied by charge-discharge cycling at 0.11C (1C=180 mA/g) and 0.5C rate between 2.7 and 4.3 V and by cyclic voltammetry. The initial discharge capacity values of a=0.05, b=0.02; a=0.05, b=0.05 are 158 and 160 mA h/g, respectively, at 0.11C rate. At 0.5C rate, phases with a=0.05, b=0.02; a=0.05, b=0.05 show better capacity retention (82% and 90%, respectively) as compared to a=0.00, b=0.00; a=0.05, b=0.00 (62% and 67%, respectively) in the range 5-50 cycle. Cyclic voltammograms clearly indicate qualitative and quantitative changes as a result of Al- and (Al, Mg)-doping to give better reversibility of the cathode. Differential scanning calorimetry (DSC) data on the charged cathodes shows an increase in the decomposition temperature (Td) by 25-34 °C accompanied by decreased heat evolution indicating better thermal stability of these (Al, Mg) co-doped (a=0.05; b=0.02,0.05) cathodic compositions as compared to pristine LiNi0.7Co0.3O2 (a=b=0.0). © 2002 Published by Elsevier Science B.V.|
|Source Title:||Solid State Ionics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 14, 2018
WEB OF SCIENCETM
checked on Jan 22, 2018
checked on Feb 19, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.