Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jallcom.2005.12.072
Title: Effects of oxygen pressure on LiCoO2 thin film cathodes and their electrochemical properties grown by pulsed laser deposition
Authors: Tang, S.B. 
Lai, M.O. 
Lu, L. 
Keywords: Charge/discharge
LiCoO2 thin film cathode
Orientation
Pulsed laser deposition
Issue Date: 9-Nov-2006
Citation: Tang, S.B., Lai, M.O., Lu, L. (2006-11-09). Effects of oxygen pressure on LiCoO2 thin film cathodes and their electrochemical properties grown by pulsed laser deposition. Journal of Alloys and Compounds 424 (1-2) : 342-346. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jallcom.2005.12.072
Abstract: LiCoO2 thin films have been deposited by pulsed laser deposition (PLD) at 600 °C and various pressures of oxygen. At 300 mTorr of oxygen, (0 0 3) oriented and well crystallized LiCoO2 thin films with a little large size of grains were grown. However, randomly oriented LiCoO2 films were obtained at 50 mTorr of oxygen. In cyclic voltammetry (CV) scans, the (0 0 3) oriented film cathode showed only one pair of main anodic and cathodic peaks at low potentials with a narrow peak separation while the randomly oriented film had two other pairs of minor peaks at high potentials besides a pair of major peaks at low potentials. The (0 0 3) oriented film had 40.2 μAh/cm2 μm of discharge capacity, whereas the randomly oriented LiCoO2 film achieved a maximum discharge capacity of 60.1 μAh/cm2 μm with the same current density of 50 μA/cm2. Moreover, the cycling stability and coulombic efficiency of the randomly oriented film were also better than those of the (0 0 3) oriented film. © 2006 Elsevier B.V. All rights reserved.
Source Title: Journal of Alloys and Compounds
URI: http://scholarbank.nus.edu.sg/handle/10635/85080
ISSN: 09258388
DOI: 10.1016/j.jallcom.2005.12.072
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