CD Skripsi
Efek Doping Terhadap Karbon Nanofiber Berbasis Daun Artocarpus Camansi Untuk Elektroda Superkapasitor
Supercapacitors are electrochemical capacitors that have a greater energy density than conventional capacitors. Supercapacitors consist of four components, namely electrolyte, separator, current collector and electrode. Electrodes are the main component in supercapacitors which function as charge storage to produce energy. Supercapacitor electrode materials from biomass-based carbon materials have been widely used, because they have a high surface area, good conductivity and stability and are environmentally friendly. This research is based on Kluwih Leaf (Artocarpus camansi) biomass without and with the addition of 0.5g and 1g of melamine, coded DK, DK-05, and DK-10 respectively. The manufacture of carbon electrodes is carried out using several processes, namely the precarbonization process, chemical activation without and with the addition of melamine using a KOH activator, carbonization using N2 gas at a temperature of 600℃ and physical activation using CO2 gas at a temperature of 800℃. The highest percentage of density shrinkage was owned by the DK-5 carbon electrode, namely 32.39%. DK samples without and with the addition of melamine have a nanofiber structure with a carbon element percentage of 43.6-52.7%. DK carbon electrodes without and with the addition of melamine have a semicrystalline structure characterized by the presence of two peaks (002) and (100) at 2θ angles of around 24°-25° and 40°-42° which contain the functional groups C-H, C-O, C=C, C≡C, P=O, and S-O. The isothermal adsorption-desorption of N2 gas shows combined type I and IV behavior with the H4 hysteresis loop. Electrochemical analysis of supercapacitor cells using Cyclic Voltammetry and Galvanostatic Charge Discharge with 1M H2SO4 electrolyte produces the highest specific capacitance values in DK-05 supercapacitor cells, respectively 408 Fg-1 and 101 Fg-1. Based on the physical and electrochemical properties of Kluwih Leaf biomass-based supercapacitor cells without and with the addition of melamine to the carbon matrix, it can improve the performance of supercapacitor cell electrodes.
Keywords: Kluwih Leaf, Internal doping, Melamine, Carbon Electrodes, Supercapacitors
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