The initial characteristics of the polypyrrole based aqueous rechargeable batteries with supercapattery characteristics

Abstract

The electrochemically synthesized polypyrrole (PPy) is investigated as a possible active material of the low-cost aqueous based secondary power sources in combination with zinc, lead oxide, and lead sulfate. The discharge capacity of the polypyrrole in the chloride-based electrolyte (for the ZnIPPy cell) is in the range 110 mAh g(-1) of PPy, while in the sulfate-based electrolyte similar to 150 mAh g(-1) of PPy (for the PbSO4 vertical bar PPy and PPy vertical bar PbO2 cells), which is close to the theoretically calculated values. Electrochemical and electrical parameters, reactions in the cells, specific capacity, specific capacitance, energy, and power, for the Zn vertical bar PPy, PPy vertical bar PbO2 and PbSO4 vertical bar PPy cells are determined. In addition, the energy efficiency, for the considered systems is estimated. Obtained values of the specific power and energy, could classified investigated systems as a battery type hybrid superacapacitors or "supercapattery".