Electrochemical capacitors (ECs) show the improved energy density, somewhat comparable to batteries, with excellent power density. Depending on the charge storage mechanism, ECs can be separated into two types: 1) supercapacitors, 2) pseudocapacitors. Supercapacitors store charges via the formation of the electric double layers at the interfaces of the electrode and electrolyte. In theory, the specific capacitance of supercapacitors can be linearly scaled with the surface area of the electrode. Hence, high-surface-area carbon nanotubes and graphenes are often used for the electrode of supercapacitors to increase the capacitance. The double layer capacitance is, however, intrinsically limited to a low value, typically in a range of 20 μF/cm2 to 50 μF/cm2. To this limitation, redox active substances have been incorporated with the porous electrodes to spuriously increase the capacitance based on their faradaic reaction (i.e. pseudocapacitance). This type of ECs is also known as pseudocapacitors. Thanks to the faradaic reaction, pseudocapacitors show higher energy density than that of supercapacitors. But instead, the power density of pseudocapacitors deteriorates plausibly due to the charge transfer resistance involved in the redox active substances. In developing pseudocapacitors, in most case, the energy density is increased at the expense of the power density. To improve the energy density without sacrificing the power density, a large number of metal oxides and conducting polymers have been recently examined on their morphology and electrochemical properties for the use of the electrode. In the present study, we show that monolithic nanowire array electrodes mediate fast ion and electron transport, allowing for charge/discharge at fast rates. In a typical procedure, we prepare a gold nanowire array electrode by the electrodeposition of Au through the cylindrical pores of the in-house anodic aluminum oxide. The subsequent electropolymerization of pyrrole results in the coaxial nanowires in which polypyrrole is conformally coated with the preformed Au nanowires. Thus prepared coaxial nanowire electrodes are examined with galavanostatic charge/discharge measurement and cyclic voltammetry, showing ideal capacitive behaviors even at high charge/discharge rates. The performance of the coaxial nanowires is further examined with electrochemical impedance spectroscopy. The energy capacity and rate capability of the coaxial Ppy/AuNW based pseudocapacitors will be discussed.