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Formation kinetics of sol-gel derived LiFePO4 olivine analyzed by reliable non-isothermal approach

Lookup NU author(s): Professor Chun Yang Yin

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Abstract

© 2022 Elsevier Ltd and Techna Group S.r.l. The formation kinetics of LiFePO4 Olivine synthesized through sol-gel route has been studied by non-isothermal approach. LiFePO4 precursors were prepared by mixing lithium dihydrogen phosphate (LiH2PO4) and iron (III) citrate (C6H5FeO7) and subsequently calcined in an Argon atmosphere at temperatures ranged from of 300–900 °C to form LiFePO4 products. Thermal behaviors of calcination process were analyzed by thermogravimetry (TGA) and differential scanning calorimetry (DSC) simultaneously, while the mineralogical properties of LiFePO4 were characterized using X-ray diffractometer (XRD). The kinetic parameters were determined by Ozawa–Flynn–Wall (OFW), Kissinger, and Kissinger-Akahira-Sunose (KAS) methods, and the reaction mechanism model was evaluated by Coats–Redfern approach. The results indicated that the reaction model of LiFePO4 formation agreed with the three-dimensional diffusion mechanism. The temperature had an essential role in the synthesis of LiFePO4. The optimum calcination temperature was 700 °C where this condition produced LiFePO4 Olivine with high degree of crystallinity, better lattice parameters and phase purity.

Publication metadata

Author(s): Amri A, Hendri YB, Saputra E, Heltina D, Yin C-Y, Rahman MM, Minakshi M, Mondinos N, Jiang Z-T

Publication type: Article

Publication status: Published

Journal: Ceramics International

Year: 2022

Volume: 48

Issue: 12

Pages: 17729-17737

Print publication date: 15/06/2022

Online publication date: 18/03/2022

Acceptance date: 03/03/2022

ISSN (print): 0272-8842

ISSN (electronic): 1873-3956

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.ceramint.2022.03.043

DOI: 10.1016/j.ceramint.2022.03.043

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