Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Electrochemical Performance of LiFePO4/C Powders Synthesized by Solution Combustion Method as the Lithium-Ion Batteries Cathode Material

Document Type : Original Reaearch Article

Authors
Maedeh Karami 1
Seyed Morteza Masoudpanah 2
Hamid Reza Rezaei 3
1 M. Sc., Faculty of Materials Engineering and Metallurgy, Iran University of Science and Technology, Tehran, Tehran, Iran
2 Associate Professor, Faculty of Materials and Metallurgy Engineering, Iran University of Science and Technology, Tehran, Tehran, Iran
3 Professor, Faculty of Materials and Metallurgy Engineering, Iran University of Science and Technology, Tehran, Tehran, Iran
10.30501/jamt.2022.297161.1186
Abstract
The current research aims to synthesize LiFePO4 nanoparticles as common cathodic materials used for lithium-ion batteries through the solution combustion synthesis method using a mixture of different types of organic fuels such as CetylTrimethylAmmonium Bromide (CTAB)-Glycine (CG), CTAB-Citric Acid (CCA), and CTAB-Urea (CU), considering the effects of fuel contents with the oxidant ratio of 5. The low rate of combustion reaction led to direct formation of LiFePO4 phase which was accompanied by some impurity phases. According to the results from the X-ray powder diffraction, single-phase LiFePO4 powders can be obtained followed by calcination at 700 °C for three h under the 95 % Ar + 5 % H2 atmosphere. The functional groups of the LiFePO4 powders were characterized based on Fourier Transform Infrared (FTIR) spectroscopy. In addition, small particles (~ 100-400 nm) with spherical morphologies as a function of fuel type were detected in Scanning Electron Microscopy (SEM) images. The electrochemical properties confirmed that the highest discharge capacity could be obtained using a mixture of CTAB and citric acid fuels (at the rate of 0.2 C, 127 mAh g-1) characterized by high crystallinity and small particle size.
Keywords
Lithium Ion Battery
Cathode Material
LiFePO4
Solution Combustion Synthesis
Electrochemical Properties
Subjects
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  • Receive Date 31 August 2021
  • Revise Date 24 October 2021
  • Accept Date 14 November 2021