ELEKTRODA KARBON DARI BIOMASSA CANGKANG ASAM JAWA (TAMARINDUS INDICA) DENGAN VARIASI AKTIVATOR KIMIA UNTUK SEL SUPERKAPASITOR

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2023-07

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Elfitra

Abstract

Porous carbon electrodes based on biomass derivatives are very effective as base material for supercapacitor cell electrodes. This electrode has many advantages, such as its application which can take place in the long term, is sustainable, renewable, easy to obtain, and has economic value. In this study, using tamarind shell biomass with a variety of chemical activators namely KOH, NaOH, and ZnCl2. The process of synthesizing supercapacitor cell electrodes involves several steps, including pre-carbonization at 200°C, chemical activation, carbonization with N2 gas at 600°C, and physical activation with CO2 gas at 800°C. The results showed that the CAJ-K sample had the highest density shrinkage value, which was 50.94%. Fourier Transform Infra Red analysis shows the presence of O-H, C-H, C≡C, and C=C functional groups in tamarind shell activated carbon. X-Ray Diffraction analysis identified amorphous characteristics in the presence of two broad peaks at an angle of 2θ at angles 24⁰ and 44⁰ in the scattering plane (002) and (100). Scanning Electron Microscopy analysis shows the formation of nanofiber structures on porous carbon electrodes. Meanwhile, Energy Dispersive X-Ray analysis shows that the element carbon has the highest percentage of atoms. Electrochemical analysis of supercapacitor cells using the Cyclic Voltametry and Galvanostatic Charge-Discharge methods with 1 M H2SO4 electrolyte showed that the CAJ-K samples had the highest specific capacitance values, namely 211 Fg-1 and 159 Fg-1. Thus, it can be concluded that tamarind shell biomass has enormous potential as a porous carbon electrode for highperformance supercapacitor cell applications.

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tamarind shell, carbon electrode, activated carbon, supercapacitor

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