Abstract: 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.

Key words: LiCoO₂ whisker, array electrode, Li ion battery, PAA template