Electrochemical double-layer capacitors (EDLCs), which are generally known as super capacitors, have been considered as power sources in telecommunication devices, standby power systems, and portable electronic devices [1]. EDLCs are promising energy storage devices for applications that require longer lifecycles, higher power capabilities, exceptional cycle lifetimes, and high rate performance [2-5]. The capacitance of an EDLC depends on the surface area of the electrode materials. Thus, carbons materials with porous structures, such as activated carbon (AC) and carbon nanotubes, are attractive because of their large surface area, unique pore structure, good adsorption properties, and electrochemical stability [6-8]. The high specific surface area of AC is expected to endow EDLCs fabricated with AC with outstanding electrochemical performance. Developing AC materials with an appropriate surface area, pore size and shape is crucial for increasing their capacity. Researchers have attempted to control these aspects of AC materials, but AC material development is still challenging. In recent years, AC fibers have received attention for their potential applications. Their structural and electronic properties make them applicable as electrodes in EDLCs [9].