CD Disertasi

Potensi Limbah Daun Pisang Sebagai Bahan Dasar Karbon Aktif Berpori Hirarkis Untuk Elektroda Superkapasitor

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Currently, supercapacitors are considered to be a high performs electrochemical energy storage technology compared to that of batteries and capacitors conventional. However, supercapacitors still have a relatively low energy density. The researchers performed intense research to increase the supercapacitor energy is being carried out in various ways, such as developing and modifying new electrode materials with high energy and capacitive performance.
This study aims to obtain activated carbon with a 3-dimensional pore structure based on banana leaf as an electrode material for electrochemical energy storage applications. Biomass as a precursor is converted into porous carbon through a combination of physical and chemical activation. The chemical activation process is focused on the KOH and ZnCl2 activators at a constant concentration of 0.5 M. Furthermore, the carbonization and physical activation processes are performed in the one-stage integrated furnace tube through the N2 and CO2 gases environment with different physical activation temperatures of 700 °C, 800 °C, and 900 °C. In addition, to maximize the electrochemical properties of the supercapacitor, two different types of electrolytes are also applied including 1 M H2SO4 acid electrolyte and 6 M KOH alkaline electrolyte.
Electrode density decreased significantly after carbonization and physical activation. In addition, the KOH and ZnCl2 impregnation at different physical activation temperatures performed a hierarchically 3-dimensional pore structure of micro-, meso-, and macropores combination, as confirmed by surface morphological analysis. The porosity characteristic showed the highest specific surface area of 860.410 m2/g. The electrochemical properties of the supercapacitor were evaluated using cyclic voltammetry and the galvanostatic charge-discharge method confirmed their specific capacitance, high energy density, and high power density. The best electrochemical properties were confirmed by chemically activated samples through ZnCl2 and physical activation of 800 °C through the galvanostatic charge-discharge technique with specific capacitance, energy density, and power of 401 F/g, 55.69 Wh/kg, and 200.90 W/kg, respectively. These results confirmed that banana leaf waste has the potential as hierarchical porous activated carbon for the supercapacitor electrode base material.
Keywords: banana leaf waste, porous activated carbon, electrode materials, supercapacitor

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 14. 221 (0004)

Penerbit

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

Deskripsi Fisik

xiv, 143 hlm.: ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 14. 221 (0004)

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

Versi lain/terkait

Lampiran Berkas

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