Studi Komparasi Pengaruh Arus Discharge Terhadap Kapasitas Retensi Baterai Ni-MH Tipe A2B7 Dan AB5

Wiwaha, Zavier Shellananda Airlangga (2025) Studi Komparasi Pengaruh Arus Discharge Terhadap Kapasitas Retensi Baterai Ni-MH Tipe A2B7 Dan AB5. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Baterai Ni-MH (Nickel-Metal Hydride) adalah jenis baterai isi ulang yang terdiri dari tiga komponen utama: elektroda negatif berupa senyawa Metal Hydride (MH), elektroda positif berupa senyawa Nickel Hydroxide (NiOH)₂, dan elektrolit berupa Potassium Hydroxide (KOH). Salah satu parameter performa baterai adalah life cycle, life cycle merupakan jumlah siklus pengisian dan pengosongan yang dapat dilakukan sebelum kapasitasnya menurun secara signifikan. Salah satu aspek penting yang perlu diperhatikan dalam performa baterai dan memiliki hubungan yang erat dengan life cycle yaitu kapasitas retensi baterai. Kapasitas retensi adalah kemampuan baterai untuk mempertahankan kapasitas penyimpanannya setelah beberapa siklus pengisian dan pengosongan, dan dapat dipengaruhi oleh arus pengisian dan pengosongan. Tujuan dari penelitian ini adalah untuk membandingkan pengaruh variasi besar nilai arus 0,3A dan 0,5A dengan menggunakan jumlah life cycle yang sama yaitu 150 siklus terhadap baterai Ni-MH tipe AB5 dan A2B7. Dilakukan pengujian Chrono Potentiometry untuk mencari kapasitas aktual pada baterai. Pengujian Electrochemical Impedance Spectroscopy dilakukan untuk mengetahui besaran resistansi pada baterai dan pengujian Cyclic Voltammetry untuk menganalisis karakteristik reaksi reduksi dan oksidasi pada variasi arus yang dilakukan. Setelah itu Scanning Electron Microscope dan X-Ray Diffraction dilakukan untuk mengetahui perubahan dari hydride terhadap variasi arus. Hasil penelitian ini menunjukkan perbedaan nilai arus pada proses charging-discharging hingga 150 siklus akan memperlihatkan perbedaan nilai resistansi dan cyclic voltammogram pada. Nilai resistansi meningkat seiring bertambahnya nilai arus karena pada arus tinggi material pada elektroda lebih mudah terdegradasi sehingga proses difusi ion menjadi tidak optimal. Sebaliknya, pada arus rendah, nilai resistansi cenderung rendah. Pada pengujian CV, peningkatan arus menyebabkan penyusutan daerah voltage window, yang menunjukkan penurunan kemampuan baterai dalam mempertahankan kapasitasnya pada arus tinggi. Dari pengujian EIS dan CV dapat diambil kesimpulan bahwa baterai dapat bekerja secara optimal pada arus yang rendah, dengan kemampuan mempertahankan kapasitas pada baterai A2B7 lebih baik dibanding AB5. Pengujian SEM dan XRD dilakukan untuk menunjukkan perubahan strutkural seiring meningkatnya arus.
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Ni-MH (Nickel-Metal Hydride) battery is a type of rechargeable battery consisting of three main components: negative electrode in the form of Metal Hydride (MH) compound, positive electrode in the form of Nickel Hydroxide (NiOH)₂ compound, and electrolyte in the form of Potassium Hydroxide (KOH). One of the battery performance parameters is life cycle, life cycle is the number of charging and discharging cycles that can be carried out before its capacity decreases significantly. One important aspect that needs to be considered in battery performance and has a close relationship with life cycle is battery retention capacity. Retention capacity is the ability of the battery to maintain its storage capacity after several charging and discharging cycles, and can be affected by charging and discharging currents. The purpose of this study was to compare the effect of large variations in current values of 0.3A and 0.5A using the same number of life cycles, namely 150 cycles, on Ni-MH batteries of types AB5 and A2B7. Chrono Potentiometry testing was carried out to find the actual capacity of the battery. Electrochemical Impedance Spectroscopy testing was conducted to determine the amount of resistance in the battery and Cyclic Voltammetry testing to analyze the characteristics of reduction and oxidation reactions at various currents. After that, Scanning Electron Microscope and X-Ray Diffraction were conducted to determine changes in hydride against current variations. The results of this study show that the difference in current values in the charging-discharging process up to 150 cycles will show differences in resistance values and cyclic voltammograms at. The resistance value increases with increasing current value because at high currents the material on the electrode is more easily degraded so that the ion diffusion process is not optimal. Conversely, at low currents, the resistance value tends to be low. In CV testing, increasing current causes a shrinkage of the voltage window area, which indicates a decrease in the battery's ability to maintain its capacity at high currents. From EIS and CV testing, it can be concluded that the battery can work optimaly at low currents, with the ability to maintain capacity in the A2B7 battery better than AB5. SEM and XRD testing were conducted to show structural changes as the current increases.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Chrono Potentiometry, Electrochemical Impedance Spectroscopy, Cyclic Voltammetry, Scanning Electron Microscope, X-Ray Diffraction
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Zavier Shellananda Airlangga Wiwaha
Date Deposited:	04 Feb 2025 08:59
Last Modified:	04 Feb 2025 08:59
URI:	http://repository.its.ac.id/id/eprint/118162

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