Lead dioxide electrodes with three-dimensional porous titanium as substrate (3D-Ti/PbO 2 ) were prepared by galvanostatic electrodeposition. The structure, morphology and electrochemical performances of 3D-Ti/PbO 2 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry and galvanostatic charge-discharge techniques. The electrochemical performances of 3D-Ti/PbO 2 were optimized by adjusting the applied deposition current density. Results reveal that the 3D-Ti/PbO 2 prepared at 1mAcm −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/PbO 2 ) 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/PbO 2 . The possible factors, which affected the electrochemical performances of 3D-Ti/PbO 2 , were interpreted in detail with voltammetric charge analysis and electrochemical impedance spectroscopy.