X-ray diffraction study of LiFePO4 synthesized by hydrothermal method

Lin Lin; Yaqiong Wen; Junke O; Yong Guo; Dan Xiao

doi:10.1039/C3RA41678J

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X-ray diffraction study of LiFePO₄ synthesized by hydrothermal method†

Lin Lin,^a Yaqiong Wen,^a Junke O,^a Yong Guo*^b and Dan Xiao*^ab

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* Corresponding authors

^a College of Chemical Engineering, Sichuan University, 29 Wangjiang Road, Chengdu 610065, PR China
E-mail: xiaodan@scu.edu.cn
Fax: +86-28-85416029
Tel: +86-28-85416029

^b College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, PR China
E-mail: guoy@scu.edu.cn
Fax: +86-28-85412907
Tel: +86-28-85416218

Abstract

Lithium iron phosphate (LiFePO₄) was prepared by hydrothermal synthesis using LiOH·H₂O, FeSO₄·7H₂O and H₃PO₄ as raw materials. We report the effects of pH, reaction temperature and reaction time on the structure properties including crystallite size, lattice parameters, and (020) crystallographic direction of LiFePO₄ particles by X-ray diffraction (XRD) method. The chemical process of the precipitation from Li–Fe(II)–P–H₂O system was also investigated. We present the evolution of the product by a solubilization-reprecipitation mechanism based on the difference of solubility products (K_sp) of different precipitates. It provides an effective and reasonable way to prepare nano-LiFePO₄ with excellent structure properties.

$Graphical abstract: X-ray diffraction study of LiFePO4 synthesized by hydrothermal method$

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Article information

DOI: https://doi.org/10.1039/C3RA41678J
Article type: Paper
Submitted: 08 Apr 2013
Accepted: 28 May 2013
First published: 29 May 2013

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RSC Adv., 2013,3, 14652-14660

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X-ray diffraction study of LiFePO₄ synthesized by hydrothermal method

L. Lin, Y. Wen, J. O, Y. Guo and D. Xiao, RSC Adv., 2013, 3, 14652 DOI: 10.1039/C3RA41678J

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