Struktur dan Mikrostruktur Material Katoda LiFePO4 akibat Penggilingan

Mardiana, Dina (2018) Struktur dan Mikrostruktur Material Katoda LiFePO4 akibat Penggilingan. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Studi struktur yang meliputi struktur kristal dan struktur mikro telah dilakukan pada serbuk LiFePO4 (LFP) akibat variasi waktu penggilingan. LFP merupakan material aktif untuk katoda baterai berbasis litium. Bahan dasar yang digunakan untuk sintesis LFP ini adalah batu besi Tanah Laut, serta bahan komersial Li2CO3 dan NH4H2PO4. Sintesis dilakukan menggunakan metode hidrotermal tanpa autoclave pada pH 4 dan temperatur kalsinasi 700°C selama 10 jam. Serbuk LFP hasil sintesis digiling dengan variasi waktu penggilingan 0, 5, 10 dan 15 jam. Karakterisasi dilakukan dengan menggunakan instrumen X-Ray Fluorescene (XRF), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), dan Particle Size Analizer (PSA). Analisis hasil uji XRF menunjukkan bahwa terdapat unsur Fe sebesar 92,15% pada batu alam. Karakterisasi dengan XRD menunjukkan bahwa sampel-sampel sebelum dan sesudah penggilingan memiliki fasa tunggal LiFePO4. Ukuran kristal LFP dengan variasi waktu penggilingan 0, 5, 10, dan 15 jam adalah 196 nm, 183 nm, 79 nm dan 65 nm. Sebagai tambahan, pada penelitian juga dilakukan pengamatan menggunakan SEM−EDX dan PSA untuk mengetahui pengaruh variasi waktu milling terhadap struktur mikro dan distribusi partikelnya. ====================================================================================================== Structural studies which include crystal structure and microstructure have been performed on LiFePO4 (LFP) powder due to variation of grinding time. LFP is an active material for lithium-based battery cathodes. The basic ingredients used for the synthesis of LFP are the Earth Rocks of iron, as well as commercial materials of Li2CO3 and NH4H2PO4. The synthesis was performed using a hydrothermal method without autoclave at pH 4 and a calcination temperature of 700° C for 10 hours. The synthesized LFP powder was milled with variations of grinding time of 0, 5, 10 and 15 hours. Characterization was performed using X-Ray Fluorescene (XRF), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Particle Size Analizer (PSA) instruments. Analysis of XRF test results showed that there are Fe element of 92.15% in natural stone. Characterization with XRD shows that samples before and after grinding have single phase LiFePO4. The size of LFP crystals with variations of grinding time of 0, 5, 10, and 15 hours were 196 nm, 183 nm, 79 nm and 65 nm. In addition, observations were made using SEM-EDX and PSA to investigate the effect of milling time variation on microstructure and particle distribution.

Item Type: Thesis (Undergraduate)
Additional Information: RSFi 530.413 Mar s-1 3100018077613
Uncontrolled Keywords: LiFePO4, Penggilingan, Struktur Kristal, Struktur Mikro, LiFePO4, Milling, Crystal Structure, Micro Structure
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC100 Crystals.
Divisions: Faculty of Natural Science > Physics > 45201-(S1) Undergraduate Thesis
Depositing User: Dina Mardiana
Date Deposited: 19 Oct 2020 01:29
Last Modified: 20 Oct 2020 00:41
URI: https://repository.its.ac.id/id/eprint/55684

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