STUDY OF THE RECHARGEABLE MANGANESE-DIOXIDE ELECTRODE

Manganese dioxide electrode doped with Bi or Pb compounds and containi ng a conductive component can be reversibly cycled with exploitation o f 50-90% of the theoretical two-electron capacity; however, after 10 o r more cycles there is a negative effect of structural changes consist ing in dissolution of Mn oxides, blocking of pores, and impairment of the pore electrolyte conductance. The electrode porosity can be increa sed by adding a powdered, little soluble compound as pore former, whic h is gradually leached out, leaving pores.