Studi Pengaruh Variasi Arus Discharge Terhadap Kapasitas Dan Karakteristik Elektrokimia Baterai Nimh Tipe Ab5 Buatan Cinabank

Amirullah, Rayhan (2023) Studi Pengaruh Variasi Arus Discharge Terhadap Kapasitas Dan Karakteristik Elektrokimia Baterai Nimh Tipe Ab5 Buatan Cinabank. Other thesis, Institut teknologi sepuluh nopember.

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Abstract

Baterai Nickel-Metal Hydride (NiMH) adalah jenis baterai isi ulang yang menggunakan paduan logam hidrida sebagai elektroda negatif dan nikel oksida sebagai elektroda positif yang merupakan baterai dengan keunggulan kapasitas energi yang tinggi dan ramah lingkungan. Dalam upaya mengurangi penggunaan energi tak terbarukan, penelitian terhadap baterai NiMH dilakukan agar memahami performa dari penyimpanan energi. Pada penelitian baterai NiMH akan dilakukan pengecekan kapasitas dengan pengaruh variasi arus terhadap kemampuan penyimpanan kapasitas baterai agar memenuhi kebutuhan masyarakat dalam energi terbarukan.
Penilitian ini menggunakan baterai NiMH tipe AA paduan metal AB5 dengan komposisi Ce (Cu Ni)2.5 dengan kapasitas 2100 mAh. Spesimen diuji karakteristik elektrokimianya menggunakan pengujian Chronopotentiometry sebanyak 50 siklus dengan variasi arus discharge 0,3 A dan 0,5 A. Pengujian Cyclic Voltammetry dengan potential sweep 0 V hingga -1,8 V dan scan rate sebesar 0,0005 V/s. Pengujian Electrochemical Impedance Spectroscopy dengan rentang frekuensi 10.000 Hz hingga 0,01 Hz, dengan amplitude sebesar 0,01 V. pengujian komposisi serta morfologi dan topografi penyusun elektroda negative baterai menggunakan pengujian X-Ray Diffraction dan Scanning Elektron Microscopy. Penurunan kapasitas baterai dihasilkan pada kedua penggunaan arus discharge 0,3 A dan 0,5 A, dimana ada penurunan kapasitas terbesar pada variasi 0,5 A sebesar 2,46%. Sementara penurunan area voltmmogram pada arus discharge 0,5 A sebesar 3 X 10-4 dari pengujian Cyclic Voltammetry. Arus discharge yang lebih besar menandakan lebih cepatnya kapasitas yang terpakai sehingga diikuti dengan adanya pengecilan kurva voltmmogram. Pada uji Electrochemical Impedance Spectroscopy, didapati nilai Warburg yang lebih besar pada arus 0,5 A yang menandakan nilai difusi hydrogen yang lebih kecil yang berarti pergerakan hydrogen menjadi lebih terbatas. Hal ini berkorelasi dengan adanya penurunan nilai crystallite yang lebih besar dan juga penurunan diameter metal hydride sebesar 20,329 µm akibat pulverization yang lebih signifikan pada arus 0,5 A
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In this era of development, global warming occurs due to the exploitation of energy use that is not environmentally friendly. Energy such as fuel oil or other fuels are non-renewable energy that causes waste or waste that causes the environment and global warming. The use of environmentally friendly energy has been widely applied, by utilizing energy from nature such as solar heat or wind can be converted into energy that can be utilized. Of course this environmentally friendly energy is very volatile and not easy to access, therefore there is a battery that is used as an energy storage system that can be easily accessed by everyone. The energy produced by the battery can be used according to the needs and needs of use. Its application can be to many electronic devices such as cell phones, laptops and household appliances also use batteries as the main power storage. Batteries have many variations, on this occasion the battery being studied is the use of Nickel Metal Hydride (Ni-MH) batteries. This research uses NiMH batteries type AA metal alloy AB5 with the composition Ce (Cu Ni)2.5 with a capacity of 2100 mAh. The specimens were tested for electrochemical characteristics using Chronopotentiometry testing for 50 cycles with a discharge current variation of 0.3 A and 0.5 A. Cyclic Voltammetry testing with a potential sweep of 0 V to -1.8 V and a scan rate of 0.0005 V/s. Electrochemical Impedance Spectroscopy testing with a frequency range of 10,000 Hz to 0.01 Hz, with an amplitude of 0.01 V. testing the composition and morphology and topography of the negative battery electrode using X-Ray Diffraction and Scanning Electron Microscopy testing.
The decrease in battery capacity is produced in both the use of discharge currents of 0.3 A and 0.5 A, where there is a decrease in capacity of 1.74%. While the decrease in voltmmogram area at a discharge current of 0.5 A is 3 X 10-4 from Cyclic Voltammetry testing. A larger discharge current indicates a faster capacity used so that it is followed by a shrinking voltmmogram curve. In the Electrochemical Impedance Spectroscopy test, a larger Warburg value was found at a current of 0.5 A which indicates a smaller hydrogen diffusion value which means that the movement of hydrogen becomes more limited. This correlates with a greater decrease in crystallite value and also a decrease in metal hydride diameter of 20.329 μm due to more significant pulverization at a current of 0.5 A.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Baterai NiMH, Electrochemical Characterization, Cyclic voltammetry, Electrochemical Impedace Spectroscopy, Chronopotentiometry, X-ray Diffraction, SEM
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage. T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Rayhan Alfath Amirullah
Date Deposited:	14 Sep 2023 06:30
Last Modified:	14 Sep 2023 06:30
URI:	http://repository.its.ac.id/id/eprint/103437

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