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All Journal JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Indonesian Physical Review eProceedings of Engineering
Siburian, Dedy Hendra
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Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Physics

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Electrochemical Properties of Activated Carbon Electrodes for Supercapacitor Application: The Effect of Various Electrolyte Concentrations of Na2SO4 rosi, Memoria; Fatmizal, M Nanang Ziad; Siburian, Dedy Hendra; Ismardi, Abrar; Abdullah, Nor Hakimin
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 12 No 2 (2023): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v12i2.18135

Abstract

To achieve the high accomplishment of the supercapacitor, various electrolyte concentrations of Na2SO2 (0.5 M, 1 M, and 2 M) were added to the activated carbon (AC) electrode. The AC has a moderate surface area of 1,500 m2/g and a pore size of 1 nm (micropore scale). The AC electrode was deposited from the mixture of AC, carbon black, and polytetrafluoroethylene (PTFE) with a weight ratio of 8:1:1 using the doctor blade method. Cyclic Voltammetry (CV), Galvanostatic Charge Discharge (GCD), and Electrical Impedance Spectroscopy (EIS) were used to characterize the electrodes electrochemically. Based on CV, GCD, and EIS characterizations, the measured specific capacitance of 17.2 F/g and ESR of 4.4 W  exhibit the best performance due to their high ionic conductivity. We can conclude that 2 M Na2SO4 is a viable option for the ionic electrolyte of the microporous AC for the high performance of a supercapacitor.
ACTIVATED CARBON PREPARED FROM COCONUT SHELL POWDER WITH LOW ACTIVATION TIME AS SUPERCAPACITOR ELECTRODES Rosi, Memoria; Fatmizal, M. Nanang Ziad; Siburian, Dedy Hendra; Ismardi, Abrar
Indonesian Physical Review Vol. 6 No. 1 (2023)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v6i1.205

Abstract

In this study, we prepared activated carbon from coconut shell with a low activating time for activated carbon (AC). The coconut shell powder (< 100 µm) allows for an effective pyrolysis process and low activation time (30 min) that reduces the cost of production. The AC has characteristics of micropore with average size of 1.9 nm and a surface area of 460.50 m2/g. For supercapacitor electrode, the AC electrodes have capacitance of 50, 66, and 67.5 F/g when 0.5 M, 1 M, and 2 M of Na2SO4 electrolyte was being inserted, respectively. In addition, the equivalent series resistance (ESR) of the AC electrode was 6.6; 4.3, and 4.1 W for 0.5 M, 1 M and 2 M of Na2SO4 electrolyte. These results indicate that the coconut shell powder can be an alternative source for supercapacitor application with moderate performance.
Pengaruh Variasi Massa Gliserol Pada Gel Elektrolit Untuk Aplikasi Superkapasitor Siburian, Dedy Hendra; Rossi, Memoria; Abrar, Abrar
eProceedings of Engineering Vol. 10 No. 1 (2023): Februari 2023
Publisher : eProceedings of Engineering

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Abstract

Abstrak—Penelitian ini merupakan pengembangan dari penelitian sebelumnya yang telah membuat gel elektrolit dengan variasi massa HydroxyEthyl Cellulose (HEC) terhadap larutan elektrolit Na2SO4. Hasil penelitian tersebut menunjukkan kestabilan elektrokimia yang baik dan ketahanan yang baik terhadap potensial window yang ditunjukkan dengan konsistensi data pengukuran cyclic voltammetry sebanyak 3 kali pengukuran. Akan tetapi stabilitas kelarutan gel elektrolit masih belum baik dilihat karena adanya endapan garam setelah gel didiamkan selama beberapa menit. Hal ini dipengaruhi oleh lemahnya ikatan fisika yang terjadi antara HEC dan Na2SO4. Untuk itu pada penelitian ini dilakukan penambahan plastisizer berupa gliserol dengan variasi massa 0,2 g; 0,4 g; 0,6 g; 0,8 g dan 1 g. Berdasarkan karakterisasi cyclic voltammetry (CV), diperoleh penambahan gliserol sebanyak 0,4 g menghasilkan kapasitansi maksimal sebesar 10,79 F/g dengan tegangan sel sebesar1,8 V. Hasil ini linear dengan konduktivitas ionic yang terukur sebesar 3,47 x 10-5 mS/cm. Kata Kunci— superkapasitor,gel elektrolit,HEC,Na2SO4, plastisizer, gliserol, konduktivitas ionik, kapasitansi
Co-Authors Abdullah, Nor Hakimin Abrar Abrar Abrar Ismardi Fatmizal, M Nanang Ziad Fatmizal, M. Nanang Ziad Memoria Rosi Rossi, Memoria