Influence of Acetylene Black Colloidal Solution on the Reactivation of the Simulation and Deactivation PbO_2/PbSO_4 Electrode

摘要

To investigate the influence of a kind of acetylene black colloidal solution (ABCs) on the regeneration of inactivation PbO_2/PbSO_4 electrode, the simulation deactivation PbO_2/PbSO_4 electrode was prepared by which PbCO_3 acted with H_2SO_4 to produce PbSO_4 and PbSO_4 was in situ electro-oxidized to PbO_2. 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 PbSO_4 and PbO_2 particles may be enhanced because of the adsorption of ABC particles on PbSO_4/H_2SO_4 and PbO_2/H_2SO_4 interface. Its adsorption behaviors can control the size of PbSO_4 particles. In the process of the anode reactivation, PbO_2/PbSO_4 electrode process polarization can be reduced. The electrode REDOX current and capacity are improved in H_2SO_4 with ABCs. ABC colloidal particles can be conducive to the structure improvement of the simulation deactivation PbO_2/PbSO_4 electrode. Its electrochemical performance can be reactivated.