The Self-Adhesive Carbon Powder Based on Coconut Coir Fiber as Supercapacitor Application

Activated carbon powder is a popular material used as an electrode material for large scale applications, especially supercapacitors because of its excellent physical and electrochemical properties. Self-adhesive carbon powder based on coconut coir was prepared via single-step pyrolysis and chemical activation with NaOH solution. A single-step pyrolysis was performed, including carbonization and physical activation in the N2/CO2 atmosphere. The physical temperature of 750 °C, 800 °C, 850 °C and 900 °C is the major focus to evaluate the behavior of self-adhesive activated carbon. The density and the microcrystalline characteristics of the electrodes are influenced by the physical activation temperature. The density feature was evaluated based on the approach of self-adhesive carbon reduction dimensions such as mass, diameter, and thickness. Microcrystalline behavior was performed by using X-ray diffraction method, and it has shown the good amorphous properties of the activated carbon. The self-adhesive activated carbon electrodes were characterized and evaluated in symmetrical supercapacitor cells. The electrochemical characterization of the carbon electrodes using cyclic voltammetry method found that the high specific capacitance of 96 F.g-1 in 1 M H2SO4 electrolyte at a low scan rate of 1 mV.s-1 with energy specific and power specific of 13.33 Wh.kg-1 and 48.03 W.kg-1, respectively.