“…Recently, various materials have been tried for developing supercapacitors [2][3][4][5], but the application is still limited due to the low energy. To improve power and energy density of the electrochemical capacitors, researchers have put attention to developing and modifying carbonaceous materials, such as increasing impactful surface area, introduction of electroactive metallic particles, they prepared various carbonaceous nanostructures such as nanowires, nanotubes [6] and nanospheres [7,8], etc.…”