Kinetic Model of LiFePO4 Formation Using Non-Isothermal Thermogravimetric Analysis

Abdul Halim Abdul Halim; Widiyastuti Widiyastuti; Heru Setyawan; Sugeng Winardi

doi:10.9767/bcrec.9.1.5508.60-65

DOI: https://doi.org/10.9767/bcrec.9.1.5508.60-65

Kinetic Model of LiFePO4 Formation Using Non-Isothermal Thermogravimetric Analysis

Abdul Halim Abdul Halim, Widiyastuti Widiyastuti , Heru Setyawan, Sugeng Winardi

Department of Chemical Engineering, Sepuluh Nopember Institute of Technology, Kampus Sukolilo, Surabaya 60111, Indonesia

Received: 19 Sep 2013; Revised: 9 Dec 2013; Accepted: 23 Jan 2014; Available online: 12 Mar 2014; Published: 30 Apr 2014.

Editor(s): Istadi Istadi

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Abstract

The formation reaction of LiFePO4 from decomposition of precursors LiOH, FeSO4.7H2O and (NH4)2HPO4 with mol ratio of Li:Fe:P=1:1:1 was investigated. The experiment was carried out by thermogravimetric differential thermal analysis (TG-DTA) method using nitrogen as atmosfer at a constant heating rate to obtain kinetic constant parameters. Several heating rates were selected, there are 5, 7, 10, 15, 17.5, 22.5 and 25 °C/min. Activation energy, pre-exponential factor and reaction order were taken using Kissinger method and obtained respectively 56.086 kJ/mol, 6.95×108 min-1, and 1.058. Based on fitting result between reaction model and experiment were obtained that reaction obeyed the three dimension diffusion model. © 2014 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0)

Keywords: LiFePO4; Thermogravimetric Differential Thermal Analysis; Kinetics Reaction

Funding: MOLINA Institut Teknologi Sepuluh Nopember

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Section: Original Research Articles

Language : EN

In 2014: BCREC Volume 9 Issue 1 Year 2014 (April 2014)

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