Capacitive behaviour of polypyrrole, prepared by electrochemical and chemical methods

Polypyrrole (PPy) electrodes for electrochemical supercapacitors were prepared by galvanostatic electropolymerization, pulse electropolymerization and chemical polymerization methods using pyrocatecholsulfonphthalein as an anionic dopant. Pulse electropolymerization provided improved impregnation of Ni plaque current collectors and formation of nanostructured coatings on Ni particles. The electrodes prepared by pulse electropolymerization …