Effects of nano-SiO2 doped PbO2 as the positive electrode on the performance of lead-carbon hybrid capacitor

The PbO2 electrodes of lead-acid batteries are normally applied as the positive electrodes in lead-carbon hybrid capacitors. However, the effective utilization rate of active materials in the electrodes is only about 12.5%, leading to a low energy density of lead-carbon hybrid capacitors. In this paper, a nano-SiO2 doped PbO2 electrode was prepared by the co-electrodeposition method. The energy density of the lead-carbon hybrid capacitor using a...