CD Skripsi

Pembuatan elektroda karbon aktif dari biomassa kulit bawang merah (allium cepa l) dengan variasi suhu karbonisasi untuk sel superkapasitor

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The global energy crisis due to limited fossil fuels and increasing energy needs has led to the development of sustainable energy storage systems. Supercapacitors are one of the promising solutions because they have high capacitance, high power density, and cycle stability. In this study, red onion skin waste (Allium Cepa L.) was utilized as an activated carbon electrode through pre-carbonization, chemical activation using 0.3 M KOH activator, and carbonization at temperatures of 650°C, 750°C, and 850°C as well as physical activation at 900°C. The best results were obtained in the KBM-650 sample, which experienced a mass loss of 20.83%, XRD showed carbon peaks at 2θ = 24.94° (002) and 44.30° (100) as well as CaCO₃ mineral peaks at 29.43°, CaO at 32-37°, and Ca(OH)₂ at 46-48°. SEM of KBM-650 showed more open pores than other variations, and BET recorded the highest surface area of 259.1 m²/g. EDX showed a carbon content of 31% by mass (44.4% atoms) and nitrogen of 1.6%. Electrochemical results showed that KBM-650 had the best performance with a specific capacitance of 507.5 F/g (CV) and 288.3 F/g (GCD), a specific energy of 8.53 Wh/kg, and a specific power of 495 W/kg.

Keywords: red onion peel, activated carbon, supercapacitor, cyclic voltammetry, galvanostatic charge–discharge.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2103126161

Penerbit

Pekanbaru : Universitas Riau FMIPA Fisika., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2103126161

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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