Various electrochemical methods with different conditions were used to prepare lead dioxide (PbO2). The observation revealed that the morphology of deposited PbO2 could be controlled by simply changing deposition parameters. Under the condition of oxygen evolution, which dominates the electrode process, uniformly distributed high porous structured PbO2 was formed. The results indicated that large current density or high potential polarization should be one of the most important and necessary factors for forming high surface area PbO2 deposit. Only beta-PbO2 was identified by X-ray diffraction measurement for the deposit prepared by present methods and solution. One potential application of this method is to prepare nanoscaled PbO2 parallel lines. (C) 2003 Elsevier Science B.V. All rights reserved.