Function of Indium in the Mixed ITE Activator for Lead-acid Batteries

抄録

The behaviors of In³⁺ and activator were studied on Pb anode of lead-acid batteries. The deposition of In with high hydrogen overpotential during the potential scan deviates negatively the hydrogen evolution potential. The current in redox couple of Pb/PbSO₄ is slightly decreased because of PbSO₄ formation on Pb adsorbed with In. This is the important difference between In³⁺ and Ag⁺ added to 5M H₂SO₄. The activator is less adsorbable on bear Pb, and adsorbed easily on PbSO₄ formed on Pb. The complex ions of In³⁺ and activator molecules are adsorbable on Pb, and PbSO₄ is initially formed on the adsorbed layer of complex ion at the potential in redox couple of Pb/PbSO₄.