CD Tesis

Sintesis Karbon Nanofiber Berbasis Serat Daun Nenas Sebagai Elektroda Karbon Superkapasitor

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The purpose of this research is to synthesize carbon nanofiber from pineapple leaf fibers as supercapacitor carbon electrodes. The synthesis of carbon nanofiber was carried out using two steps, namely KOH concentration variations and a combination of pineapple leaf fibers with pineapple leaves. The first step was to vary KOH concentration of 0.3 M, 0.5 M, 0.7 M, and 0.9 M. The best KOH concentration in the first step was used as the activating agent for the second step. The second step used combination of pure pineapple leaf fibers, pure pineapple leaf and a combination of pure pineapple leaf fibers and pure pineapple leaf. Preparation of the carbon nanofiber was started by processing pineapple leaf waste in some steps, i.e: (i) washing pineapple leaf, (ii) cutting in a size of ± 40 cm, (iii) taking fibers done by pulling pineapple leaf fibers mechanically, (iv) drying of pineapple leaf fibers, and (v) drying the fibers at a temperature of 110 oC for 48 hours. The pineapple leaf fibers were then pre-carbonized at a temperature of 250 °C for 2.5 hours and followed by grinding for 20 hours and chemical activation. The carbonization was carried out at a temperature of 600 oC in an N2 gas environment and followed by a physical activation process using CO2 gas at a temperature of 850 oC for 2.5 hours. Based on the two steps of this study, the samples were coded (AC-0.3, AC-0.5, AC-0.7, and AC-0.9) for the first step and (AC-0.9, AC2-0.9 and AC3-0.9) for the second step, respectively.
The densities of carbon nanofiber electrodes in the first and second steps of this study decrease after the carbonization-activation process. The density decrease after carbonization-activation of the first and second steps ranges of 27.93%-51.72% and 49.56%-54.46%. The highest specific surface area of the carbon electrode of the first and second steps are 945 m2 g-1 for electrodes AC-0.9 and 1078 m2 g-1 for AC3-0,9 electrodes, respectively. The carbon nanofiber formed on the surface morphology of the carbon electrodes have a diameter of 35 nm-185 nm with an atomic percentage of carbon element of 79.38%-84.33% for the first step and 35 nm-156 nm with atomic percentage range of carbon elements of 83,02%-91.26% for the second step, respectively. The X-ray diffraction pattern of carbon electrodes in the first and second steps of the study shows that there are two wide peaks at a scattering angle of 22o-25o corresponding to the 002 plane which reflect the graphite structure, and an angle of 43o-45o corresponding to the plane 100, which is a amorphous carbon characteristic. The optimum specific capacitance of the carbon electrodes at the two steps of this study based on the CV method was obtained as high as 191 F g-1.


Keywords: Pineapple leaf fibers, carbon nanofiber, supercapacitor

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 17. 220 (0001)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Fisika., 2020

Deskripsi Fisik

xv, 129 hlm.; ill.; 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 17. 220 (0001)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

PASCASARJANA (MAGISTER) FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

Versi lain/terkait

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