Decoupling electrochemical parameters of molecular-level-controlled polypyrrole and graphene oxide nanocomposite

•Synthesis of molecular-level-controlled polymer nanocomposite from TMCP and GO.•Nanocomposite was achieved by predoping of Py:NDSA:Py via oxidative polymerization.•The crystallinity, crystallite size, doping, and conductivity were controlled.•Crystallinity-controlled polypyrrole-based supercapacitor electrode was produced.•The specific capacitance and cycle stability (75%) over 2000 cycles were improved.