Composite electrodes were fabricated based on activated carbons such as YP-17 and BP-20, and conducting polymer of polypyrrole (pPy) prepared by chemical polymerization in our laboratory. Mixed binders of Poly (vinylidene-fluorideco-hexafluoropropylene) (PVdF-HFP) and polyvinylpyrrolidone (PVP) in n-methyl- 2-pyrrolidinone (NMP) were added to the activated carbons. Electrochemical characteristics of unit cells such as charge-discharge, specific capacitance, ESR, specific energy, cyclic voltammetry (CV) and impedance were measured. It was noted that a pPy content within 8 wt. % greatly increased the electrochemical characteristics, mechanical strength and flexibility with the fixed 5 wt. % of mixed binder. Especially, the BP-20 electrode with 7 wt% of pPy exhibited better electrochemical characteristics than commercialized products, with 34.77 F/g of specific capacitance, 0.65 Ω of AC-ESR, 8.16 Wh/kg of specific energy, and specific power of 1,830 W/kg. Power outputs were compatible with electric vehicle applications, in due consideration of Ragone relations.