Influence of Acetylene Black Colloidal Solution on the Reactivation of the Simulation and Deactivation PbO₂/PbSO₄ Electrode

Abstract

To investigate the influence of a kind of acetylene black colloidal solution (ABCs) on the regeneration of inactivation PbO2/PbSO4 electrode, the simulation deactivation PbO2/PbSO4 electrode was prepared by which PbCO3 acted with H2SO4 to produce PbSO4 and PbSO4 was in situ electro-oxidized to PbO2. The cyclic voltammetry and scanning electron microscope had been used to test the electrochemical performance and observe surface topography respectively. The experimental results show that the electrical conductivity of PbSO4 and PbO2 particles may be enhanced because of the adsorption of ABC particles on PbSO4/H2SO4 and PbO2/H2SO4 interface. Its adsorption behaviors can control the size of PbSO4 particles. In the process of the anode reactivation, PbO2/PbSO4 electrode process polarization can be reduced. The electrode REDOX current and capacity are improved in H2SO4 with ABCs. ABC colloidal particles can be conducive to the structure improvement of the simulation deactivation PbO2/PbSO4 electrode. Its electrochemical performance can be reactivated.