CD Tesis

Sintesis Karbon Aktif Berbasis Biomassa Kulit Bawang Putih Untuk Aplikasi Elektroda Superkapasitor

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Activated carbon derived from biomass has become the most competitive electrode material for supercapacitors, due to its renewable and sustainable nature. Optimization efforts were made for the process of making supercapacitor electrodes by varying the activator and molarity in order to obtain a high specific capacitance. This study aims to synthesize supercapacitor electrodes from garlic peel biomass using activator and molarity variations in chemical activation. The basic material for making carbon electrodes goes through a drying process, then pre-carbon processes at a temperature of 250 °C for 2,5 hours, refining the sample using mortal and ball milling for 20 hours, the sieving process using a 53 μm sieve, the activation process, printing the pellets using the Hydraulic Press with a pressure of 8 tons and held for 2 minutes, as well as the pyrolysis process with the carbonization stage. carried out in an atmosphere of Nitrogen gas at a temperature of 600 °C, and the physical activation process at a temperature of 850 °C for 2 hours. Each sample was coded (KOH 0,25M, KOH 0,5M, and KOH 0,75M) for the KOH activator, (ZnCl2 0,25M, ZnCl2 0,5M, and ZnCl2 0,75M) for ZnCl2 activator, and without chemical activation as a comparison.
The shrinkage of carbon mass in this study was obtained by 29,4%. The density of carbon electrodes after the pyrolysis process decreased, for activation using KOH activator decreased by 11,2%-18%, for ZnCl2 activator by 5,5%-12,6%, and for activator without activator is 13,6%. The X-ray diffraction pattern of the carbon electrode on the KOH and ZnCl2 activators shows the presence of two sloping peaks at a scattering angle of 24o-25o in accordance with the 002 plane that reflects the graphite structure, and an angle of 44o-46o which corresponds to plane 100, which is characteristic of amorphous carbon. The activated carbon functional groups in the KOH and ZnCl2 activator samples showed absorption at wavenumbers 890-900 cm-1, 1300-1400 cm-1, dan 2300 cm-1, 2950 cm-1, and 3900-4100 cm-1. The surface morphology of the carbon electrode for the KOH activator is fiber and nanosheet and has an atomic percentage of carbon element content of 38,25% -66,41% for ZnCl2 activator, namely honeycomb with an atomic percentage of carbon elements of 77,03%-83,44%. Specific Capacitance was determined by the cyclic voltammetry and galvanostatic charge-discharge method. The highest capacitance was 286,3 F/g and 325,95 F/g, respectively. Thus, garlic skin has the potential as an electrode for supercapacitor applications.
Keywords: Garlic skin, Activator, Supercapacitor, Activated Carbon, Electrodes

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 17. 221 (0005)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Fisika., 2021

Deskripsi Fisik

xiii, 140 hlm.: ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 17. 221 (0005)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

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