Please use this identifier to cite or link to this item:
|Title:||Influence of Li-Ion kinetics in the cathodic performance of layered Li(Ni 1/3CO 1/3Mn 1/3)O 2|
|Authors:||Shaju, K.M. |
|Source:||Shaju, K.M., Rao, G.V.S., Chowdari, B.V.R. (2004). Influence of Li-Ion kinetics in the cathodic performance of layered Li(Ni 1/3CO 1/3Mn 1/3)O 2. Journal of the Electrochemical Society 151 (9) : A1324-A1332. ScholarBank@NUS Repository. https://doi.org/10.1149/1.1775218|
|Abstract:||Galvanostatic intermittent titration technique (GITT) at 25 and 50°C and electrochemical impedance spectroscopy (EIS) at 25°C as a function of cell voltage and cycle number were performed on the layered oxide cathode, Li(Ni 1/3Co 1/3Mn 1/3)O 2. The Li-ion diffusion coefficient D Li(GITT) obtained for GITT was stable with a value of ∼3 × 10 -19 cm 2/s in the voltage range, 3.8-4.4 V vs. Li. The D Li(EIS) was higher by an order of magnitude than the D Li(GITT) in the above voltage range. A minimum in the D Li vs. voltage curve was observed at ∼3.7 V coinciding with the voltage-plateau region in the charge-discharge cycling curves, indicating a possible reversible structural phase transition or order-disorder transition in the compound. EIS studies as a function of cycle number show mat the surface film and the bulk contribution to the cell resistances remain stable with cycling. The proportional increase in charge-transfer resistance (R ct) with cycling observed when charged to 50 mAh/g (∼3.7 V) and charged to 4.4 V of the cell indicate the possible influence of phase transition on the charge-transfer kinetics. The variation of D Li derived from GITT and EIS as a function of cell voltage and D Li(EIS) with the cycle number and the kinetic parameters obtained from the impedance plots were correlated with the electrochemical performance. © 2004 The Electrochemical Society. All rights reserved.|
|Source Title:||Journal of the Electrochemical Society|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 15, 2018
WEB OF SCIENCETM
checked on Jan 30, 2018
checked on Feb 19, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.