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Pembuatan Karbon Aktif Dari Biomassa Kulit Buah Matoa (Pometia Pinnata) Dengan Variasi Larutan Elektrolit Untuk Meningkatkan Kinerja Elektroda Superkapasitor

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This research focuses on the preparation of activated carbon from the biomass of matoa (Pometia pinnata) fruit skin with a variety of electrolyte solutions to improve the performance of supercapacitor electrodes. The main objective is to develop activated carbon as an electrode material for supercapacitor applications. Its physical and chemical properties were characterized using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). In addition, the electrochemical performance was evaluated through Cyclic Voltammetry (CV) and Galvanostatic Charge-Discharge (GCD) methods. X-ray diffraction analysis showed two main diffraction peaks at angles 2θ = 24.247° and 45.005° corresponding to microcrystalline dimensions of Lc of 6.230 nm and La of 23.345 nm, indicating a graphite structure favorable for energy storage. FTIR spectra confirm the presence of C≡C (alkyne) or C≡N (nitrile) functional groups involving chemical reactions between carbon and KOH resulting in a more complex carbon structure rich in active functional groups. In addition, this activated carbon exhibits good porosity and high surface area supporting the performance of the electrode in energy storage. The results of CV electrochemical testing show that sample HKI has the highest specific capacitance of 259,842 F/g, followed by sample HKBR with 204,042 F/g, and sample H has a specific capacitance of 194,700 F/g. GCD analysis revealed that HKI and HKBR samples have the best performance in energy storage with specific capacitance in HKI 224.910 F/g, specific energy 29.775 Wh/kg, and specific power 139.589 W/kg and HKBR sample showed specific capacitance 328,220 F/g, specific energy 44.147 Wh/kg, and specific power 140.620 W/kg, while H sample had specific capacitance 149.050 F/g, specific energy 19.589 Wh/kg and specific power 97.290 W/kg. Activated carbon produced from matoa fruit peel has structural characteristics suitable for supercapacitor applications, with good porosity and high surface area. Overall, the addition of redox electrolyte additives 0.1 M KI and 0.1 M KBr has a significant effect on ion activity with a very small ion size, the electrode is able to absorb electrolytes evenly on the surface which can increase the conductivity and mobility of the supercapacitor electrode performance and provide additional places in terms of charge storage through a combination of EDLC and pseudocapacitance, besides that H also still provides good performance even though it only relies on charge storage through EDLC as shown from strong acid solutions that have high conductivity. This research indicates that biomass waste has the potential as a raw material in the development of efficient energy storage materials that can be a promising alternative for future applications.
Keywords : Matoa fruit peel, Activated carbon, Electrolyte, Supercapacitor

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Номер вызова

2103113904

Издатель

Pekanbaru : Universitas Riau FMIPA Fisika., 2025

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Язык

Indonesia

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Классификация

2103113904

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Редакция

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Тема(ы)

FISIKA

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Заявление об ответственности

Mutia

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