CD Disertasi

Pembuatan Elektroda Karbon Superkapasitor Dari Daun Jahe Merah (Zingiber Officinale Var Rubrum) Dengan Aktivator Zncl2

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Activated carbon made of red ginger leaves (Zingiber Officinale Var Rubrum) has been used as the base material for supercapacitor electrodes. The activation process made based on different concentration of zinc chloride activator. This research focuses on various concentration of ZnCl2 activator such as 0.1 M, 0.3 M, and 0.5 M. The process of making carbon electrodes made of red ginger leaves is prepared in several stages such as drying, pre-carbonization, refining, chemical activation and creating carbon pellets as electrodes. The pellets are created in a uniform shapes of coins. The monolith sample is then optimized through a single-stage integrated high-temperature pyrolysis process. Carbonization of N2 gas absorption is done by starting from a room temperature 30°C to 600°C. This process is integrated with physical activation until the high temperature reaches a temperature of 800°C under the influence of CO2 gas absorption. The measurement results of activated carbon electrodes were obtained through several characterizations such as the density of the electrodes after the pyrolysis process. Analysis of the crystallinity degree produces amorphous carbon structure at the electrode with an angle range of 2θ which is located at diffraction angles of 002 (22-24)° and 100 (42-44)°. The fourier transformation spectroscopy test identifying the presence of O-H, C-H, C=C, and C-O functional groups contained in the sample. Furthermore, the morphological structure of the surface of activated carbon electrode was characterized using an electron microscope and the result is the form of a sponge structure composed of nanofibers. The electrochemical properties of the supercapacitor cells were tested under the influence of a low concentration of 1M aqueous H2SO4 electrolyte. Electrochemical properties were tested at a low potential of 0-1 V and a fixed scanning rate of 1 mV/s using cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) methods. The optimum condition of electrochemical properties was found in the sample of activated carbon from red ginger leaves with an activator concentration of ZnCl2 0.3 M. The highest specific capacitance value resulted from the CV test was 215.75 F/g, while for GCD a higher capacitance value was obtained which is 227 F/g. The results show, red ginger leaves have a great potential as an active carbon base material to improve the performance of supercapacitors.
Keywords : red ginger leaves, supercapacitor, carbon electrode, specific capacitance

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

1803111388

Penerbit

Pekanbaru : Universitas Riau – FMIPA – FISIKA., 2022

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

1803111388

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

nadya

Versi lain/terkait

Lampiran Berkas

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