Afifa, Ulfiana Ihda (2023) Sintesis Aerogel Karbon Berbasis Tandan Kosong Kelapa Sawit sebagai Elektrokatalis Reaksi Reduksi Oksigen pada Katoda dalam Baterai Air Laut. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Beberapa wilayah di Indonesia kesulitan mengakses listrik. Salah satu solusi alternatif yang dapat digunakan adalah baterai air laut. Baterai air laut mengalami reaksi reduksi oksigen yang perlu dibantu dengan elektrokatalis yang baik dimana memiliki gugus N-piridin dan dapat berasal dari aerogel karbon berbasis tandan kosong kelapa sawit (TKKS). Penelitian ini bertujuan untuk mempelajari pengaruh variasi jumlah mol NH4OH (0,025; 0,05; 0,075 dan 0,1 mol) dan suhu pirolisis (600, 700 dan 800⁰C) terhadap pembentukan N-piridin serta mempelajari performansi elektrokimia pada baterai air laut. Aerogel karbon disintesis dari TKKS yang didelignifikasi dengan NaOH. Selulosa kemudian didispersi dengan urea-NH4OH dan dilakukan gelasi. Selanjutnya gel dikoagulasi dengan Etanol dan dilakukan solvent exchange dengan air demin kemudian dilakukan freeze drying lalu dipirolisis. Analisis gugus fungsi dilakukan dengan Fourier Transform Infrared (FTIR), morfologi dengan Scanning Electron Microscopy (SEM) dan uji kristalinitas dengan X‒Ray Diffraction. Uji performansi elektrokimia dilakukan menggunakan Potensiostat dan Battery Analizer. Hasil analisa aerogel karbon dengan variasi suhu pirolisis 700°C dan aerogel karbon dengan variasi jumlah mol NH4OH 1:2 memiliki kandungan pyridinic-N dan menunjukkan performa terbaik dengan mekanisme reaksi ORR jalur 4 elektron dengan kinetic current density Ik = 0,21 mA/cm2 dan 0,29 mA/cm2 serta current density Io = 1,68 μA/cm2 dan 7,05 μA/cm2.
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Some areas in Indonesia have difficulty accessing electricity. One of the alternative is sea water battery because of its good theoretical performance and great seawater potential in Indonesia. However the performance is limited by the sluggish Oxygen Reduction Reaction, therefore electrocatalyst which contains N-pyridinic group is needed to increase the rate of reaction. Oil palm empty fruit bunch carbon aerogel is one of the alternative because of its excellent electrocatalytic performance and can be made from abundant material with high content of cellulose. This research focuses on studying the influence of NH4OH mol variation (0,025; 0,05; 0,075 and 0,1 mol) and pyrolisys temperature (600, 700 dan 800⁰C) on the formation of N-pyridic.and to study electrochemical performance in seawater battery. Research started with synthesizing cellulose aerogel with urea-ammonia crosslinking precursor and followed by pyrolysis of cellulose aerogel to carbon aerogel at 600, 700, and 800°C. Samples were characterized using FTIR, XRD, SEM, CV, LSV, LP and battery analizer. The result of carbon aerogel with pyrolysis temperature of 700°C and carbon aerogel with mol NH4OH of 1:2 contain N-pyridinic and show the best performance with four electron pathway with kinetic current density Ik = 0,21 mA/cm2 and 0,29 mA/cm2 and current density Io = 1,68 μA/cm2 and 7,05 μA/cm2.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Carbon Aerogel, Oil Palm Empty Fruit Bunch, Oxygen Reduction Reaction, Seawater Bettery |
| Subjects: | Q Science > QD Chemistry > QD115 Electrochemical analysis Q Science > QD Chemistry > QD320 Cellulose. Hydrolysis Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis Q Science > QD Chemistry > QD569 Electrocatalysis. T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis |
| Depositing User: | Ulfiana Ihda Afifa |
| Date Deposited: | 07 Feb 2023 08:33 |
| Last Modified: | 07 Feb 2023 08:33 |
| URI: | http://repository.its.ac.id/id/eprint/96407 |
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