The composites of polyaniline (PANI) with reduced graphene oxide (PANI/rGO) and metals of iron, copper, and cobalt have been synthesized and coated on the nickel foam (NF) priors to measurement in three electrodes system to investigate the electrochemical properties. Surface area of PANI increased from 48.371 m2/g to 69.091 m2/g after compositing with rGO and the capacitance changed from 246.50 F/g to the highest capacitance 285.89 F/g in the form of PANI/rGO-Cu. Meanwhile, PANI/rGO-Co and PANI/rGO-Fe showed lower capacitance with 250.047 F/g and 254.71 F/g, respectively. Capacitance of bi-and tri-metal content was lower than PANI.
Keywords: rGO; PANI; transition metals; composites; capacitance