Activated Carbon-MnO₂ Composite on Nickel Foam as Supercapacitors Electrode in Organic Electrolyte

Abstract

Since energy storage is an essential component of global energy development, starting with batteries, fuel cells, and supercapacitors, it is an important topic of particular concern. Supercapacitors continue to be developed due to their high power density when compared to batteries, despite all of the benefits and drawbacks of the three. Activated carbon (AC) is materials that frequently utilized as a supercapacitor electrode due to the high surface area. Metal oxides such as manganese dioxide (MnO 2 ) with high teoritical specific capacitance which loaded in activated carbon will caused an improvement on supercapacitors electrochemical performance. The composite was fabricated using blending method with a mass difference of MnO 2 , then deposited on a porous Ni-foam substrate. Ni-foam pores play as main role on the process of transferring electrolyte ions in the system so that the AC/MnO 2 has, resulting a supercapacitor based AC-MnO 2 15% nanocomposite with a gravimetric capacitance, energy density and power density of 79 F/g at 1 A/g, W/kg and Wh/kg respectively. The cell could maintain up to 93% after 100 cycles.