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Dinda Prastika Nabila Nahda
"Superkapasitor menjadi salah satu media penyimpanan energi listrik yang dapat digunakan sebagai alternatif baterai. Pada penelitian ini, telah dilakukan studi terhadap kinerja superkapasitor elektroda karbon mesopori yang disintesis dari kulit pisang. Mula-mula kulit pisang dikeringkan di bawah sinar matahari, lalu dihaluskan menjadi bubuk kulit pisang. Bubuk kulit pisang ini disintesis menjadi karbon mesopori dengan cara dipanaskan dan dikarbonisasi menggunakan template (pencetak). Pencetak yang digunakan adalah gel silika 60 dan MCM-41. Karbon mesopori yang dihasilkan dikarakterisasi menggunakan TGA, XRD, XRF, TEM, spektrofotometri Raman, N2-physisorption, dan FTIR untuk mengetahui sifat yang terbentuk. Karbon mesopori hasil sintesis dengan pencetak MCM-41 menghasilkan luas pemukaan spesifik sebesar 467,24 m2/g, sedangkan dengan pencetak silika gel 60 pada perbandingan prekursor karbon dan silika gel 3:1 menghasilkan luas permukaan spesifik 476,97 m2/g. Evaluasi kinerja sebagai superkapasitor dilakukan dengan membuat komposit nickel foam-karbon mesopori hasil sintesis dan menggunakannya sebagai elektroda kerja untuk superkapasitor. Pengujian dilakukan dengan menggunakan CV, GCD, dan EIS. Elektroda dari karbon mesopori hasil sintesis dengan pencetak MCM-41 memberikan nilai kapasitansi spesifik sebesar 38,71 F/g pada scan rate 0,1 V/s dan 12,20 F/g pada densitas arus 0,05 A/g. Elektroda dari karbon mesopori dengan pencetak gel silika 60 perbandingan 3:1 (MC-S-3@NF) menghasilkan nilai kapasitansi spesifik sebesar 23,14 F/g pada scan rate 0,1 V/s dan 7,91 F/g pada densitas arus 0,05 A/g. Sedangkan uji stabilitas elektroda MC-S-3@NF sebanyak 2500 siklus meningkatkan persen kapasitansi elektroda sebesar 30%.
......Supercapacitors have become one of the electrical energy storage that can be used as an alternative to batteries. In this study, research has been conducted on the performance of mesoporous carbon supercapacitor electrodes synthesized from banana peels. Initially, banana peels were dried under sunlight, then ground into banana peel powder. This banana peel powder was synthesized into mesoporous carbon by heating and carbonizing it using a template. The templates used were silica gel 60 and MCM-41. The synthesized mesoporous carbon was characterized using TGA, XRD, XRF, TEM, Raman spectroscopy, N2-physisorption, and FTIR to determine the properties of material. Mesoporous carbon synthesized using the MCM-41 template resulted in a specific surface area of 467.24 m2/g, while using the silica gel 60 template at a carbon and silica gel precursor ratio of 3:1, it yielded a specific surface area of 476.97 m2/g. The performance evaluation as a supercapacitor was conducted by creating a composite of nickel foam-synthesized mesoporous carbon and using it as the working electrode for the supercapacitor. Supercapacitor evaluation was carried out using CV, GCD, and EIS. The synthesized mesoporous carbon with the MCM-41 template electrode provided a specific capacitance value of 38.71 F/g at a scan rate of 0.1 V/s and 12.20 F/g at a current density of 0.05 A/g. The mesoporous carbon with the silica gel 60 template at a 3:1 ratio electrode (MC-S-3@NF) yielded a specific capacitance value of 23.14 F/g at a scan rate of 0.1 V/s and 7.91 F/g at a current density of 0.05 A/g. Meanwhile, the stability test of the MC-S-3@NF electrode for 2500 cycles increased the electrode capacitance percentage by 30%."
Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2024
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UI - Skripsi Membership  Universitas Indonesia Library
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Babatope Olufemi
"This work investigates the comparative adsorptive removal of Ni (II) ions from aqueous solution using coconut shell and banana peel. Optimum conditions for adsorption were determined by experimental design, while Analysis of Variance (ANOVA) and BonferroniHolm Posthoc significance statistical tests on operational parameters were also conducted. The parametric effect of adsorbate dose, adsorbent dose, pH, contact time, particle size and temperature were varied individually, and their effect on the percentage of Ni (II) ion removal was estimated. The maximum percentage removal was achieved at a pH of 8.0 by both adsorbents. The optimum conditions obtained for both adsorbents were 4.5 g adsorbent dose, 30 min contact time and 25 oC for coconut shell, and 4.5 g adsorbent dose, 120 mins and 25 oC for banana peel. The Langmuir isotherm best described the adsorption, with correlation coefficient (R2 ) values of 0.9821 and 0.9744 for banana peel and coconut shell respectively. The mean free energy from the Dubinin-Radushkevich isotherm suggested chemisorption, and the adsorption mechanism was found to fit the second order."
Depok: Faculty of Engineering, Universitas Indonesia, 2018
UI-IJTECH 9:3 (2018)
Artikel Jurnal  Universitas Indonesia Library