Abstract:The simultaneous electrodeposition technology of Pb and PbO2 from methanesulfonic acid system was investigated. Effects of cell voltage, temperature, concentration of Pb2+ and MSA on anodic and cathodic current efficiency, energy consumption and ratio of α-PbO2 and β-PbO2 phases were studied. The results show that the anodic and cathodic current efficiency are improved as the cell voltage increases from 2.1 V to 2.3 V, but reduced with further increase of cell voltage. When the electrolysis temperature is higher than 25 ℃, the cathode and anode current efficiency gradually decrease with temperature. The concentration of Pb2+ and MSA concentration has little effect on current efficiency. Under the condition of cell voltage of 2.3 V, electrolytic temperature of 15 ℃, Pb2+ concentration of 0.5 mol/L, and MSA concentration of 0.5 mol/L, the cathodic current efficiency is 98.63%, the anodic current efficiency is 90.11%, and 1.66 t of refined lead and 1.75 t of lead dioxide can be obtained with 1 MWh of electricity consumption. The Pb deposited on cathode is found to be smooth and compact. The PbO2 deposited on anode is mainly composed of β-PbO2 with open, porous structure and strong conductivity. The proportion of α-PbO2 rises with increase of cell voltage, temperature and MSA concentration, and drops with Pb2+ concentration.