Electrodeposition of polypyrrole–carbon nanotube composites for electrochemical supercapacitors

In this work we introduce a new electrochemical strategy for the fabrication of composite polypyrrole (PPY)–multiwalled carbon nanotube (MWCNT) composites for electrochemical supercapacitors (ES). The problem of low adhesion of PPY films on stainless steel and Ni substrates is addressed by the use of pyrocatechol violet (PV) dye as an anionic dopant. The experimental data indicates that strong adhesion of PPY films is attributed to catecholate …