Fabrication and characterization of redox-based electrochemical capacitors

Mohamed Effendi, Salmi (2015) Fabrication and characterization of redox-based electrochemical capacitors. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This report discuss about the research on fabrication and characterization of redox-based electrochemical capacitors (ECs). Fabrication of ECs are increasing in demand as it fills the gap between batteries and capacitor. The capacitance of ECs by using activated carbon mixed with ruthenium oxide (RuO2) having different composition ratios are being study. The purpose of this experiment is to vary the electrode materials and fabrication process being used in order to develop a better ECs. Apart from that, sol-gel process is being used to prepare hydrous RuO2 which increase the performance by at least two times greater as compared to crystalline RuO2 and other materials. Slurry technique is used to prepare the electrode materials where the electrolyte being use is potassium hydroxide (KOH). Based on previous research, increase of RuO2 improve the capacitance performance. From the experiment, the increment of RuO2 compositions result in lower cycling stability for charge discharge analysis while the specific capacitance obtained increases. From observation, preparation of hydrous RuO2 plays an important role in achieving better capacitance performance. The maximum specific capacitance obtained from this experiment was 5.1029 F/g at the highest compositions of RuO2 of 50 wt%.

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