Effect of citric acid on the performance of LiFePO4 as a cathode material for lithium batteries

Mat, A. and Sulaiman, K.S. and Arof, Abdul Kariem (2016) Effect of citric acid on the performance of LiFePO4 as a cathode material for lithium batteries. Ionics, 22 (1). pp. 135-142. ISSN 0947-7047, DOI https://doi.org/10.1007/s11581-015-1607-8.

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Official URL: http://dx.doi.org/10.1007/s11581-015-1607-8


Lithium iron phosphate (LiFePO4) is a potential cathode material for lithium-ion batteries. This material has been prepared via a sol-gel synthesis method using acetate-based reactants with and without chelating agent. The chelating agent is citric acid. The precursor material obtained on heating the reactants at 500 °C for 4 h has been calcined at different temperatures between 500 and 900 °C for another 4 h to obtain the desired product. The structure and morphology of the calcined materials have been verified using X-ray diffraction (XRD) and scanning electron microscopy (SEM). As the calcination temperature increases, larger crystals with clear polyhedral shape have been observed. The LiFePO4 prepared from acetate-based reactants with citric acid chelating agent and calcined at 700 °C for 4 h is observed to deliver 81 mAh/g specific discharge capacity, when coupled with a Li-anode. On calcining the precursor at 700 °C for 12 h, the specific discharge capacity increases to 133 mAh/g.

Item Type: Article
Funders: Malaysian Ministry of Science, Technology and Innovation
Uncontrolled Keywords: Batteries; Cathodes; Charging/discharging; Electrochemical characterizations; Materials preparations
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 06 Oct 2017 09:25
Last Modified: 05 Oct 2018 01:26
URI: http://eprints.um.edu.my/id/eprint/17910

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