Analisis Pengaruh Variasi Doping Magnesium Oksida pada Katoda Na2Zr(1-x)MgxO3 Terhadap Struktur Kristal, Morfologi, dan Performa Elektrokimia Sodium-ion Battery (SIB)

Fernanda, Muhammad Faiz Aditya (2023) Analisis Pengaruh Variasi Doping Magnesium Oksida pada Katoda Na2Zr(1-x)MgxO3 Terhadap Struktur Kristal, Morfologi, dan Performa Elektrokimia Sodium-ion Battery (SIB). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Baterai merupakan penyimpanan energi terbaik untuk menunjang kebutuhan energi. Baterai ion natrium (SIB) merupakan kandidat pengganti baterai ion litium karena kelimpahannya yang tinggi, biaya natrium yang rendah, dan memiliki prinsip kerja yang mirip dengan baterai ion lithium. Material Na2ZrO3 dipilih dikarenakan memiliki kapasitas teoritis sebesar 289 mAh/g. Salah satu strategi untuk meningkatkan performa elektrokimia, yaitu strategi doping. Oleh karena itu, pada penelitian ini, sintesis Na2Zr(1-x)MgxO3 (x = 0, 0.03, 0.05, 0.07, dan 0.1) dilakukan dengan memvariasikan mol MgO. Sintesis ini menggunakan metode solid state reaction untuk dilakukan evaluasi terhadap struktur kristal dan morfologi yang terbentuk, serta performa elektrokimia. Hasil pengujian menunjukkan semua variasi yang dilakukan terbentuk Na2ZrO3 dengan struktur kristal monoclinic. Dimana penambahan magnesium yang digunakan ketika proses sintesis Na2ZrO3 berpengaruh terhadap ukuran kristal katoda dengan range 641.874 Å – 818.622 Å. Selain itu, penambahan magnesium berpengaruh terhadap parameter kisi yang semakin menyusut dan impuritas yang berkurang dari 20.62% menjadi 6.86%. Dari hasil pengujian SEM, kelima sampel menunjukkan distribusi partikel terbanyak di range 0.5-1.5 µm. Dari hasil pengujian elektrokimia, pengujian CV dengan penambahan magnesium dapat mempengaruhi jarak puncak reaksi oksidasi-reduksi yang semakin besar dalam range 0.377-0.652 V. Hasil pengujian EIS juga berpengaruh dengan nilai Rct dari masing-masing sampel yang menunjukkan nilai yang semakin kecil dalam range 769.1-3372.1 Ω. Dan hasil pengujian GCD juga memberikan pengaruh terhadap peningkatan specific capacity menjadi 20.56 mAh/g untuk charge dan 5.54 mAh/g untuk discharge. Selain itu, juga memberikan pengaruh terhadap peningkatan efisiensi kolombik menjadi 47.19% dan penurunan persentase degradasi menjadi 2.14%. Yang berarti penambahan magnesium memiliki stabilitas siklus yang baik dan meningkatkan kapasitas spesifik.

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Batteries are the best energy storage to support energy needs. Sodium-ion battery (SIB) is a candidate to replace Lithium-ion battery because of its high abundance, low cost of sodium, and having a similar working principle to Lithium-ion battery. The Na2ZrO3 material was chosen because it has a theoretical capacity of 289 mAh/g. One strategy to improve electrochemical performance is the doping strategy. Therefore, in this study, the synthesis of Na2Zr(1-x)MgxO3 (x = 0, 0.03, 0.05, 0.07, and 0.1) was carried out by varying the moles of MgO. This synthesis uses the solid-state reaction method to evaluate the crystal structure and morphology formed, as well as the electrochemical performance. The test results showed that all the variations made formed Na2ZrO3 with a monoclinic crystal structure. Where the addition of magnesium used during the Na2ZrO3 synthesis process affects the cathode crystal size in the range of 641,874 Å – 818,622 Å. In addition, the addition of magnesium affected the shrinking lattice parameters and reduced impurities from 20.62% to 6.86%. From the results of the SEM test, the five samples showed the highest particle distribution in the range of 0.5-1.5 µm. From the results of electrochemical testing, CV testing with the addition of magnesium can affect the peak distance of the oxidation-reduction reaction which is getting bigger in the range 0.377-0.652 V. The EIS test results also affect the Rct value of each sample which shows a smaller value in the range 769.1 -3372.1 Ω. And the results of the GCD test also have an effect on increasing the specific capacity to 20.56 mAh/g for charge and 5.54 mAh/g for discharge. In addition, it also had an effect on increasing colombic efficiency to 47.19% and decreasing the percentage of degradation to 2.14%. Which means the addition of magnesium has good cycle stability and increases the specific capacity.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Baterai ion Natrium, Karakterisasi Material, Metode Solid State, Penambahan Magnesium, Performa Elektrokimia Doping Magnesium Oxide, Electrochemical Performance, Material Characterization, Sodium ion Battery, Solid State Method
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Faiz Aditya Fernanda
Date Deposited:	26 Jul 2023 02:46
Last Modified:	26 Jul 2023 02:46
URI:	http://repository.its.ac.id/id/eprint/99284

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