Analisis Pengaruh Waktu Iradiasi Microwave Terhadap Sifat Superkapasitor Dari Karbon Aktif Berbahan Rumput Laut Dan Penambahan Redox Pair Pada Larutan Elektrolit

Sa'diyah, Nur Halimahtus (2025) Analisis Pengaruh Waktu Iradiasi Microwave Terhadap Sifat Superkapasitor Dari Karbon Aktif Berbahan Rumput Laut Dan Penambahan Redox Pair Pada Larutan Elektrolit. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Rumput laut merupakan tanaman yang banyak dibudidayakan karena memiliki kandungan karbon yang tinggi dan jumlahnya sangat melimpah terutama diindonesia sehingga dapat dimanfaatkan sebagai bahan dasar elektroda untuk meningkatkan performa superkapasitor. Selain itu penambahan KI/I2 diharapkan meningkatkan kapasitansi superkapasitor. Tujuan dari penelitian ini yaitu untuk menganalisis waktu iradiasi microwave terhadap sifat kapasitif material karbon aktif sebagai elektroda superkapasitor. Metode yang digunakan dalam pembuatan nanopori karbon dari rumput laut sebagai elektroda dengan parameter temperatur durasi iradiasi microwave dengan daya 200 watt selama 10, 12, dan 17 menit. Rumput laut diaktivasi menggunakan activating agent KOH dengan suhu pirolisis yakni 800 o C. Karbon aktif yang dihasilkan diletakkan secara bersusun dimana membran hidrogel polimer electrolyte diletakkan diantara kedua elektroda dan dipress secara bersamaan membentuk ”coin cell”. Membran hidrogel polimer electrolyte tersusun atas aquades, H3PO4. Untuk karekterisasi material digunakan XRD, SEM-EDX, FTIR, sedangkan untuk mengetahui sifat elektrokimia dilakukan Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS), dan Galvanostatic Charge Discharge (GCD). Penelitian ini menghasilkan kinerja kapasitansi spesifik terbaik sebesar 337.8 F/g (dengan scan rate 5 mV/s) pada elektroda MW17 dengan luas permukaan spesifik sebesar 4725 m2 /g. Kerapatan energi yang dihasilkan 30 Wh Kg-1 dan rapat daya sebesar 678 W kg-1. Kinerja elektrokimia semakin bertambah seiring bertambahnya waktu iradiasi microwave, hal ini disebabkan peningkatan luas permukaan spesifik.
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Seaweed is a plant that is widely cultivated because it has a high carbon content and is very abundant, especially in Indonesia, so that it can be utilized as an electrode base material to improve supercapacitor performance. In addition, the addition of KI/I2 is expected to increase the capacitance of supercapacitors. The purpose of this study is to analyze the effect of the addition of redox pair and hydrothermal temperature on the capacitive properties of activated carbon material as a supercapacitor electrode. The method used in the manufacture of carbon nanopores from seaweed as electrodes has temperature parameters of microwave irradiation duration with 200 watts of power for 10, 12, and 17 minutes. Seaweed was activated using the activating agent KOH at a pyrolysis temperature of 800 °C. The resulting activated carbon was placed in a row where the polymer electrolyte hydrogel membrane was placed between the two electrodes and pressed simultaneously to form a “coin cell”. The polymer electrolyte hydrogel membrane is composed of distilled water, H3PO4. A KI/I redox pair was added to the membrane for comparison. Material characterization was done using XRD, SEM-EDX, and FTIR, and electrochemical properties were determined using galvanostatic charge discharge (GCD), electrochemical impedance spectroscopy (EIS), and cyclic voltage measurement (CV). This study achieved the best specific capacitance performance of 337.8 F/g (at a scan rate of 5 mV/s) on the MW17 electrode, with a specific surface area of 4725 m²/g. The resulting energy density was 30 Wh/kg, and the power density was 678 W/kg. The electrochemical performance improved with increasing microwave irradiation time, attributed to the enhancement of the specific surface area.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Superkapasitor, Rumput Laut, Redox pair, karbon aktif, supercapacitor, seaweed, activated carbon
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD195.B56 Biomass energy
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 27101-(S2) Master Thesis
Depositing User:	Nur Halimahtus sadiyah
Date Deposited:	30 Jan 2025 16:30
Last Modified:	30 Jan 2025 16:30
URI:	http://repository.its.ac.id/id/eprint/117187

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