Effect of Sintering Time and Heating Rate on the Structure of LiFePO₄/C Prepared by Electrospinning

Abstract

The electrospinning combined with the sintering process were used to prepare carbon-coated lithium iron phosphates (LiFePO4/C) cathode materials for lithium ion batteries (LIB). In sintering process, different procedures were used to synthesize the LiFePO4/C composite materials. The effect of the sintering time and heating rate on the structure, surface morphology and carbon content of LiFePO4/C composite materials were investigated by wide angel X-ray diffraction (WXRD), scanning electron microscope (SEM), and elemental analysis (EA) techniques. It has better structure when the sintering process is as follows: heating rate is 2 oC min-1 and pre-oxidized time is 3h at 280 oC and carbonized time is 8h at 700 oC.