Influence of dipping time on LiCoO2 whisker arrays and their electrochemical properties

LiCoO2 whisker array were prepared by using porous anodic aluminium oxide (PAA) template in sol solution containing Li(OAc) and Co(OAC)(2) for different dipping time. Electron microscope results show that with the dipping time increasing, the lengths of the LiCoO2 whisker increase, the distribution becomes more uniform and the crystal lattice disfigurement decreases. X-ray diffraction investigation demonstrates that LiCoO2 whisker is a layered structure of LiCoO2 crystal. Electrochemical tests show that LiCoO2 whisker array electrodes have good electrochemical reversibility and higher capacitance.