Lead dioxide electrodes with three-dimensional porous titanium as substrate (3D-Ti/PbO2) were prepared by galvanostatic electrodeposition. The structure, morphology and electrochemical performances of 3D-Ti/PbO2 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry and galvanostatic charge-discharge techniques. The electrochemical performances of 3D-Ti/PbO2 were optimized by adjusting the applied deposition current density. Results reveal that the 3D-Ti/PbO2 prepared at 1 mA cm(-2) had nanoparticles on its surface with abundant crystal orientations. It had a high capacity of 132 mAh g(-1) with an active material utilization of 57% at discharge current density of 0.9 A g(-1). With the same condition, the lead dioxide electrode with planar titanium substrate (Ti/PbO2) only had a capacity of 20.8 mAh g(-1). The high electrochemical active surface area and small charge transfer resistance resulted in the high capacity of 3D-Ti/PbO2. The possible factors, which affected the electrochemical performances of 3D-Ti/PbO2, were interpreted in detail with voltammetric charge analysis and electrochemical impedance spectroscopy. (C) 2014 Elsevier Ltd. All rights reserved.