Synthesis of 3D flower-like Co3O4/Polypyrrole nanosheet networks electrode for high performance supercapacitors A Physicochemical and engineering aspects

3D flower-like Co3O4/Polypyrrole (PPy) nanosheet networks are directly grown onto Ni foam involving the solution-based method and in-situ oxidative polymerization of pyrrole for supercapacitor electrode materials. The as-prepared electrode takes advantage of the exceptional architecture of Co3O4 and high electronic conductivity of PPy. Electrochemical measurements show that the areal capacitance of 3D Co3O4/PPy electrode is 6.81Fcm⿿² at 5mAcm⿿² in 6molL⿿¹ KOH aqueous solution. The capacitance is 95% of original capacitance after 1000 cycles at 20mAcm⿿². With superior electrochemical characteristics and the ease of large scale fabrication, the 3D flower-like Co3O4/Polypyrrole nanosheet networks provide promising electrode material for supercapacitor applications.