2014 : Effect of fuel rate and annealing process of LiFePO4 cathode material for Li-ion batteries synthesized by flame spray pyrolysis

Prof.Dr.Ir. Sugeng Winardi M.Eng


Abstract

In this study the effect of fuel rate and annealing on particle formation of LiFePO4 as battery cathode using flame spray pyrolysis method was investigated numerically and experimentally. Numerical study was done using ANSYS FLUENT program. In experimentally, LiFePO4 was synthesized from inorganic aqueous solution followed by annealing. LPG was used as fuel and air was used as oxidizer and carrier gas. Annealing process attempted in inert atmosphere at 700 C for 240 min. Numerical result showed that the increase of fuel rate caused the increase of flame temperature. Microscopic observation using Scanning Electron Microscopy (SEM) revealed that all particles have sphere and polydisperse. Increasing fuel rate caused decreasing particle size and increasing particles crystallinity. This phenomenon attributed to the flame temperature. However, all produced particles still have more amorphous phase …