Influence of dopant structure and charge on supercapacitive behavior of polypyrrole electrodes with high mass loading

Chromotropic acid disodium salt (CHR) and its derivatives, such as 2,7-Bis(2-sulfophenylazo)chromotropic acid tetrasodium salt (CHR-BS), 2-(phenylazo)chromotropic acid disodium salt (CHR-P) and 2-(1-naphthyldiazenyl)chromotropic acid disodium salt (CHR-N) were investigated as new anionic dopants for chemical polymerization of polypyrrole (PPy) for application in electrodes of electrochemical supercapacitors (ES). The analysis of electron …