Saputro, Bayu Seno Aji (2026) Pengaruh Variasi Konsentrasi Kobalt (Co) Terhadap Struktur Kristal Dan Morfologi Material Katoda Nmc (Li-NMC) Hasil Sintesis Metode Ko-Presipitasi Dalam CSTR Untuk Aplikasi Baterai Ion Lithium. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Material katoda Lithium Nickel Manganese Cobalt Oxide (Li-NMC) merupakan salah satu material yang banyak digunakan pada baterai ion lithium karena memiliki kapasitas spesifik tinggi, stabilitas struktur yang baik, serta densitas energi yang tinggi. Penelitian ini bertujuan untuk mensintesis material katoda Li-NMC menggunakan metode ko-presipitasi serta menganalisis pengaruh variasi konsentrasi kobalt (Co) terhadap fase dan morfologi kristal yang terbentuk. Sintesis dilakukan menggunakan metode ko-presipitasi dalam Continuous Stirred Tank Reactor (CSTR) dengan variasi konsentrasi Co sebesar 5%, 7,5%, 10%, dan 12,5%, kemudian dilanjutkan dengan proses kalsinasi. Karakterisasi material dilakukan menggunakan X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), dan Energy Dispersive X-ray Spectroscopy (EDX). Hasil XRD menunjukkan bahwa seluruh sampel berhasil membentuk fase utama Li(NMC)O₂ dengan struktur berlapis tipe α-NaFeO₂. Nilai Full Width at Half Maximum (FWHM) pada bidang (104) berturut-turut sebesar 0,557°, 0,391°, 0,263°, dan 0,822°, sedangkan ukuran kristalit yang dihitung menggunakan persamaan Scherrer sebesar 16,03 nm, 22,84 nm, 33,96 nm, dan 10,88 nm untuk variasi Co 5%, 7,5%, 10%, dan 12,5%. Hasil SEM menunjukkan ukuran partikel rata-rata masing-masing sebesar 42,93 µm, 33,17 µm, 36,19 µm, dan 28,6 µm, sedangkan hasil EDX mengonfirmasi keberadaan unsur utama penyusun material tanpa adanya pengotor yang signifikan. Hasil penelitian menunjukkan bahwa variasi konsentrasi Co mempengaruhi karakteristik fase dan morfologi kristal Li-NMC. Konsentrasi Co sebesar 10% menghasilkan karakteristik terbaik yang ditunjukkan oleh nilai FWHM terkecil, ukuran kristalit terbesar, serta distribusi partikel yang lebih homogen dibandingkan variasi lainnya
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Susp Lithium Nickel Manganese Cobalt Oxide (Li-NMC) cathode material is one of the most widely used materials in lithium-ion batteries due to its high specific capacity, excellent structural stability, and high energy density. This study aims to synthesize Li-NMC cathode material using the co-precipitation method and to investigate the effect of cobalt (Co) concentration variation on the crystal phase and morphology of the resulting material. The synthesis was carried out using the co-precipitation method in a Continuous Stirred Tank Reactor (CSTR) with Co concentrations of 5%, 7.5%, 10%, and 12.5%, followed by a calcination process. Material characterization was performed using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Spectroscopy (EDX). The XRD results showed that all samples successfully formed the primary Li(NMC)O₂ phase with a layered α-NaFeO₂-type structure. The Full Width at Half Maximum (FWHM) values of the (104) plane were 0.557°, 0.391°, 0.263°, and 0.822°, while the crystallite sizes calculated using the Scherrer equation were 16.03 nm, 22.84 nm, 33.96 nm, and 10.88 nm for Co concentrations of 5%, 7.5%, 10%, and 12.5%, respectively. SEM analysis revealed average particle sizes of 42,93 µm, 33,17 µm, 36,19 µm, and 28,6 µm, while EDX characterization confirmed the presence of the main constituent elements without significant impurities. The results indicate that Co concentration significantly influences the crystal phase and morphology of Li-NMC. The sample containing 10% Co exhibited the best characteristics, as evidenced by the lowest FWHM value, the largest crystallite size, and a more homogeneous particle distribution compared to the other samples
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Li-NMC, Ko-Presipitasi, Kobalt, XRD, SEM, Kristalinitas, Li-NMC, Co-Precipitation, Cobalt, XRD, SEM, Crystallinity |
| Subjects: | Q Science > QC Physics > QC100 Crystals. Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QC Physics > QC451 Spectroscopy |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Bayu Seno Aji Saputro |
| Date Deposited: | 21 Jul 2026 02:31 |
| Last Modified: | 21 Jul 2026 02:31 |
| URI: | http://repository.its.ac.id/id/eprint/135257 |
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