Pengaruh Campuran Graphene Oxide - Activated Carbon pada Elektroda terhadap Performansi Solid State Superkapasitor

Izzul Haq, Enrico Gabriel (2025) Pengaruh Campuran Graphene Oxide - Activated Carbon pada Elektroda terhadap Performansi Solid State Superkapasitor. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Superkapasitor merupakan penyimpan energi dengan keamanan dan daya tinggi. Kinerja superkapasitor dipengaruhi oleh elektrolit dan elektroda. Penelitian ini dilakukan untuk membuat superkapasitor berbasis solid polymer electrolyte (SPE) berbasis polyvinyl alcohol-glycerol (PVA-G) dan pengaruh penambahan graphene oxide (GO) pada elektroda activated carbon (AC) terhadap performa superkapasitor. SPE disintesis dengan metode solution casting untuk variasi Ga(NO₃)₃ 0–15 wt%, sedangkan elektroda AC/GO (0–6 wt% GO) dibuat melalui doctor-blade coating superkapasitor dibuat dalam konfigurasi coin-cell tanpa separator. Karakterisasi meliputi XRD, FTIR, SEM, EIS, CV, dan GCD. Konsentrasi 15 wt% Ga(NO₃)₃ menurunkan kristalinitas PVA sampai dengan 13% dan menghasilkan konduktivitas ionik tertinggi 6,0 × 10⁻⁴ S cm⁻¹ pada 25 °C konduktivitas meningkat sampai 1,0 × 10⁻³ S cm⁻¹ pada 80°C. Energi aktivasi transport ion yang rendah (8,47 J mol⁻¹) mendukung peningkatan mobilitas ion dalam SPE. Penambahan 5 wt% GO ke dalam AC menurunkan resistansi internal superkapasitor dari 10.820 Ω (0 % GO) menjadi 1.644 Ω. Pada scan-rate 10 mV s⁻¹, kapasitansi spesifik meningkat ~6 kali lipat, dari 0,97 F g⁻¹ (0 % GO) menjadi 6,07 F g⁻¹ (5 % GO). GCD menunjukkan kenaikan densitas energi dari 0,134 Wh kg⁻¹ menjadi 0,842 Wh kg⁻¹ dan densitas daya dari 691 W kg⁻¹ menjadi 3031 W kg⁻¹ pada komposisi elektroda optimum.
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Supercapacitors are energy storage devices that offer high safety and power density. The performance of supercapacitors is influenced by the electrolyte and electrode materials. This study aimed to develop a supercapacitor based on a solid polymer electrolyte (SPE) composed of polyvinyl alcohol–glycerol (PVA-G) and to investigate the effect of adding graphene oxide (GO) to activated carbon (AC) electrodes on supercapacitor performance. The SPE was synthesized using the solution casting method with Ga(NO₃)₃ concentrations varying from 0 to 15 wt%, while AC/GO electrodes (0–6 wt% GO) were fabricated using the doctor-blade coating technique. The supercapacitor was assembled in a coin-cell configuration without a separator. Characterizations included XRD, FTIR, SEM, EIS, CV, and GCD analyses. At 15 wt% concentration, Ga(NO₃)₃ reduced the crystallinity of PVA to 13% and yielded the highest ionic conductivity of 6.0 × 10⁻⁴ S cm⁻¹ at 25 °C, which increased to 1.0 × 10⁻³ S cm⁻¹ at 80 °C. The low ion transport activation energy (8.47 J mol⁻¹) supported enhanced ion mobility within the SPE. The addition of 5 wt% GO into the AC electrode reduced the internal resistance of the supercapacitor from 10,820 Ω (0% GO) to 1,644 Ω. At a scan rate of 10 mV s⁻¹, the specific capacitance increased approximately sixfold, from 0.97 F g⁻¹ (0% GO) to 6.07 F g⁻¹ (5% GO). GCD analysis showed an increase in energy density from 0.134 Wh kg⁻¹ to 0.842 Wh kg⁻¹ and power density from 691 W kg⁻¹ to 3,031 W kg⁻¹ at the optimum electrode composition.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Elektroda, Kapasitansi, Graphene oxide, Polyvinyil Alcohol, Electrode, Capacitance, Graphene oxide, Polyvinyil Alcohol
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Enrico Gabriel Izzulhaq
Date Deposited:	25 Jul 2025 03:41
Last Modified:	25 Jul 2025 03:41
URI:	http://repository.its.ac.id/id/eprint/121493

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