Fabrication of LiCoO2, LiTixCo1-xO2 and LiNixCo1-xO2 thin film cells for rechargeable lithium microbatteries
M. C. RAO1,*
Affiliation
- Department of Physics, Andhra Loyola College, Vijayawada – 520 008, India
Abstract
LiCoO2 thin films were grown by pulsed laser deposition technique on silicon substrates. Two important deposition
parameters such as substrate temperature and oxygen partial pressure during the thin film deposition were controlled. The
electrochemical measurements were carried out on Li//LiCoO2 cells with a lithium metal foil as anode and LiCoO2 film as
cathode of 1.5 cm2 active area using a Teflon home-made cell hardware. The silicon substrate was mounted on Ag wire
with silver paint and covered by insulating epoxy leaving only the PLD film as active area. Electrochemical titration was
made by charging and discharging the cells using the galvanostatic mode of a Mac-Pile single 608 electrochemical analyzer
system in the potential range between 2.0 and 4.2 V. The Li//LiCoO2 cells were tested in the potential range 2.6 – 4.2 V.
Specific capacity as high as 202 mC/cm2μm was measured for the film grown at 600 0C. The electrochemical
measurements were also carried out on Li//LiTixCo1-xO2 and Li//LiNixCo1-xO2 cells. The Li//LiTixCo1-xO2 cell delivered a
specific capacity of 220 mC/μm cm2 and the Li//LiNixCo1-xO2 cell delivered a specific capacity of 215 mC/μm cm2..
Keywords
LiCoO2, PLD films, Electrochemical properties.
Citation
M. C. RAO, Fabrication of LiCoO2, LiTixCo1-xO2 and LiNixCo1-xO2 thin film cells for rechargeable lithium microbatteries, Optoelectronics and Advanced Materials - Rapid Communications, 5, 1, January 2011, pp.85-88 (2011).
Submitted at: Dec. 15, 2010
Accepted at: Jan. 26, 2011