CD Skripsi

Pemanfaatan Karbon Aktif Dari Limbah Kubis (Brassica Oleraceae Var. Capitata) Sebagai Bahan Elektroda Superkapasitor

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Cabbage (Brassica oleracea var. capitata) waste a by-product of agricultural activities and vegetable distribution, has potential to be utilized as a raw material for activated carbon in the fabrication of supercapacitor electrodes. This study aims to synthesize and characterize carbon electrodes derived from cabbage waste using potassium hydroxide (KOH) as a chemical activating agent with varying concentrations of 0.1 M, 0.3 M, and 0.5 M, labeled as KU-0.1, KU-0.3, and KU-0.5, respectively. The synthesis process involved pre-carbonization at 200°C, chemical activation with KOH, physical carbonization in a gas atmosphere at 600°C, and physical activation at 850°C. The highest density reduction was observed in sample KU-0.3, with a value of 45.403%. X-ray diffraction (XRD) analysis revealed two broad peaks at 2θ around 23–24º and 43–44º, indicating an amorphous carbon structure corresponding to (002) and (100) diffraction planes. Nitrogen adsorption-desorption (BET) analysis showed that KU-0.3 possessed a dominant microporous structure with pore sizes of approximately 1.5–2 nm. Scanning Electron Microscopy (SEM) demonstrated uniform and evenly distributed pores. Elemental composition analysis indicated that sample KU-0.3 contained 77.03% carbon (by atom) and 18.68% oxygen (by atom), reflecting successful activation and the presence of functional groups that may enhance electrochemical performance. Electrochemical tests using Cyclic Voltammetry (CV) and Galvanostatic Charge-Discharge (GCD) methods showed that KU-0.3 achieved the highest specific capacitance, reaching 378,4 F/g (CV) and 387.3 F/g (GCD). These results demonstrate that activated carbon derived from cabbage waste using 0.3 M KOH has high potential as an electrode material for supercapacitors.
Keywords: cabbage waste, activated carbon, electrode, supercapacitor, specific capacitance.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103126160

Penerbit

Pekanbaru : Universitas Riau FMIPA Fisika., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103126160

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

Mutia

Versi lain/terkait

Lampiran Berkas

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