Urea Assisted Combustion Synthesis of LiFePO4/C Nano composite Cathode Material for Lithium Ion Battery Storage System

Abstract

In this present work, we demonstrated economical way to synthesize nano crystalline LiFePO4Olivine structured LiFePO4/C nanocomposite using urea as fuel and sucrose as carbon source were calculated using the total oxidizing and reducing valencies of the components which provide as numerical coefficients for stoichiometric balance so that the equivalent ratio is unity followed by heat treatment at 600 °C for 6 - 10 h, under Ar (90%) and H2 (10%) gas atmosphere.The resultant products are characterized by XRD to know the phase formation and for estimation of the crystallite size. The XRD patterns were collected in steps of 0.02° over the range of 10° ≤2θ ≤80° at room temperature with a constant counting time of 0.1 s per step, From XRD all the powders showing the nano sized crystallite sizes in the range of 40-45nm. The morphologies of the powders were investigated by a scanning electron microscopy (SEM) all samples indicate the agglomeration of powder with highly porous nature in all the samples. The synthesized olivine powders were subjected to thermogravimetric / differential scanning calorimetry (TG-DSC) as the reference material in the temperature range of 25–1000°C with a heating rate of 10°C/min in air and nitrogen atmosphere. Raman spectra were obtained with 514.5 nm Ar-Ion laser radiation at a laser power of 150 mW in the range of 100- 2000cm-1 for a total of 10 scans to increase the signal-to-noise ratio and with 4 cm-1 spectral resolutionwerestudied.