Activated carbon and graphene based electrochemical capacitor in aqueous electrolyte

Dorah, Norasimah (2014) Activated carbon and graphene based electrochemical capacitor in aqueous electrolyte. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This report discuss about the capacitance of an electrochemical capacitor (EC) by using same type of electrode material but different electrolyte. The electrode use in this experiment is activated carbon mixed with graphene. There are two electrolytes that are being use which are potassium hydroxide (KOH) and sulphuric acid (H2SO4). The fabrication of an EC improves the demands in the usage of batteries and capacitor. However, low energy density of EC limiting its application. Hence, researchers try to develop a better EC by increasing their surface area by using a porous material. Apart from that, previous researches found out that different electrolytes give out small effect in the capacitance of an EC. The method used in this report is solid state technique. The graphene was horizontally oriented and hence lowering down the specific capacitance (Csp) value. The specific capacitance value gained from the experiment was 13 F g-1 and 14 F g-1 in KOH and H2SO4 electrolytes respectively.

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