Fahrudin, Moch. Iqbal (2023) Analisis Pengaruh Variasi Mol ZrO2 pada Katoda Na2Zr1-xO3 Terhadap Struktur Kristal, Morfologi, dan Performa Elektrokimia Sodium-Ion Battery (SIB). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sebagai kandidat untuk sistem penyimpanan energi yang baru, sodium-ion battery (SIB) diharapkan dapat menggantikan lithium-ion battery (LIB) karena sumber daya natrium yang melimpah yaitu 200 kali lebih banyak dari litium di alam, biaya rendah, keamanan tinggi, dan ramah lingkungan. Pada penelitian ini, sintesis Na2Zr1-xO3 dilakukan dengan memvariasikan mol ZrO2 melalui perbandingan Na2CO3:ZrO2 = 1:0.8, 1:0.9, 1:1, 1:1.1 dan 1:1.2 menggunakan metode solid-state reaction. Na2Zr1-xO3 dilakukan pengujian XRD untuk mengetahui fasanya serta SEM untuk mengetahui morfologinya. Hasil pengujian menunjukkan semua variasi pada penelitian ini terbentuk Na2ZrO3 dengan struktur kristal monoclinic. Semakin banyak jumlah mol ZrO2 (dari 0.8;0.9;1;1.1;1.2) ketika proses sintesis Na2ZrO3 menunjukkan tren pergesaran puncak difraksi semakin ke kanan dan mengakibatkan bertambahnya nilai FWHM sehingga mengungkapkan pelebaran puncak dan bertambahnya regangan kisi. NZ 1-0.8 (mol Na2CO3: mol ZrO2 yaitu 1:0.8) memiliki parameter kisi dan posisi 2 theta yang paling bersesuaian dengan ICDD 00-035-0770 dan merupakan sampel dengan fasa impurities ZrO2 terkecil dengan persentase sebesar 6.85%. Dari hasil pengujian SEM, kelima sampel menunjukkan morfologi berupa aglomerat partikel sekunder yang tersusun atas partikel primer yang lebih kecil. Katoda Na2Zr1-xO3 dilakukan pengujian CV untuk mengetahui fenomena oksidasi dan reduksi yang terjadi, uji GCD untuk memperoleh kapasitas spesifik katoda, dan uji EIS untuk mengetahui nilai resistansi elektrolit serta resistansi charge transfer. Dari hasil pengujian elektrokimia, NZ 1-0.8 memiliki jarak puncak reaksi oksidasi-reduksi yang cukup rendah sebesar 0.29 V dan memiliki performa kapasitas discharge terbaik dari variasi yang lain. Hal ini ditunjukkan pada siklus 5 memiliki kapasitas charge sebesar 17.84 mAh/g dan kapasitas discharge sebesar 18.7 mAh/g yang mengungkapkan kapasitas charge/discharge yang hampir sama pada setiap siklusnya sehingga memiliki efisiensi kolombik terbaik sebesar 95.39%. Selain itu, NZ 1-0.8 memiliki persentase degradasi kapasitas terendah sebesar 0 % setelah 50 siklus. Impedansi dari katoda NZ 1-0.8 diukur menggunakan EIS, menunjukkan resistansi charge transfer sebesar 747.4 Ω.
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As a candidate for a new energy storage system, sodium-ion battery (SIB) is expected to replace lithium-ion battery (LIB) due to abundant sodium resources that are 200 times more than lithium in nature, low cost, high safety, and environmentally friendly. In this study, the synthesis of Na2Zr1-xO3 was carried out by varying the mole of ZrO2 through the ratio of Na2CO3: ZrO2 = 1:0.8, 1:0.9, 1:1, 1:1.1 and 1:1.2 using the solid-state reaction method. Na2Zr1-xO3 was tested by XRD to determine its phase and SEM to determine its morphology. The test results showed that all variations in this study formed Na2ZrO3 with a monoclinic crystal structure. The more the number of moles of ZrO2 (from 0.8; 0.9; 1; 1.1; 1.2) when the Na2ZrO3 synthesis process shows a trend of shifting the diffraction peak increasingly to the right and resulting in increased FWHM values so as to reveal peak broadening and increased lattice strain. NZ 1-0.8 (mole Na2CO3: mole ZrO2 i.e. 1:0.8) has lattice parameters and 2 theta positions that best correspond to ICDD 00-035-0770 and is the sample with the smallest ZrO2 impurities phase with a percentage of 6.85%. From the SEM test results, the five samples showed morphology in the form of agglomerates of secondary particles composed of smaller primary particles. The Na2Zr1-xO3 cathode was subjected to CV testing to determine the oxidation and reduction phenomena that occur, GCD test to obtain the specific capacity of the cathode, and EIS test to determine the value of electrolyte resistance and charge transfer resistance. From the results of electrochemical testing, NZ 1-0.8 has a fairly low oxidation-reduction reaction peak distance of 0.29 V and has the best discharge capacity performance of other variations. This is shown in cycle 5 has a charge capacity of 17.84 mAh/g and a discharge capacity of 18.7 mAh/g which reveals almost the same charge/discharge capacity in each cycle so that it has the best colombic efficiency of 95.39%. In addition, NZ 1-0.8 has the lowest capacity degradation percentage of 0% after 50 cycles. The impedance of the NZ 1-0.8 cathode was measured using EIS, showing a charge transfer resistance of 747.4 Ω.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | cathode, electrochemical performance, energy, material characterization, sodium-ion battery, katoda, performa elektrokimia, energi, karakterisasi material, baterai-ion sodium. |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2941 Storage batteries |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Moch. Iqbal Fahrudin |
| Date Deposited: | 25 Jul 2023 05:47 |
| Last Modified: | 25 Jul 2023 05:47 |
| URI: | http://repository.its.ac.id/id/eprint/99199 |
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