PERFORMANCE OF SUPERCAPACITOR ELECTRODE WITH HYDROTHERMAL ACTIVATED CARBON AND SUPPORTING MATERIALS GRAPHENE AND CARBON NANO TUBE (CNT)

• Main Author: Nur Wulandari K, Nina
• Format: Theses
• Language: Indonesia
• Subjects: Teknik kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/53477
• Institution: Institut Teknologi Bandung

Waste from the palm oil production is an abundant biomass resources that can be used as raw material for high value added products. One of the product that can be made from oil palm biomass waste is activated carbon. The charasteristic of activated carbon with high surface area and porosity and good conductivity is suitable as supercapacitor electrode material. Activated carbon is prepared by carbonization out by hydrothermal carbonization. Hydrother-mal carbonization is a process that carried out with aqueous media in a pressurized reactor at a lower temperatur that the pyrolysis process. This research focused on production of activated carbon from empty fruit bunch by hydrothermal carbonization process using CaCl2 as activating agents. Ratio of raw material/activating agent/water was 1:2:3. Hydrothermal carbonization was carried out at 275? for an hour with a yield of 19.27%. Furthermore, hydrochar was activated at a temperatur of 800? in presence of CO2 for 2 hours and produces a tield of 17.28%. Activated carbon was modified with 1 M nitric acid (HNO3). A self-supporting and flexible activated carbon/graphene/carbon nanotube (AC/GP/CNT) electrode has been rationally designed for constructing high-performance supercapacitor. The CNT is beneficial for improving the electronic conductivity of the electrode, while AC particles could effectively suppress the aggregation of GP and CNT due to their blocking effect. The synergistic effect among the AC-Ca, GP and CNT validate the AC-Ca/GP/CNT as a promising electrode for supercapacitor, exibiting greatly enhanced electrochemical performances in comparison with the pure GP, pure CNT and AC-Ca electrode. The AC-Ca/GP/CNT electrode delivers a high specific capacitance of 53,51 F g-1.