Synthesis of C/Cr2O3 Composite Microspheres Contains Cr2O3 Nanoparticles and Evaluation Effect of Solvothermal Processing Parameters on the Composite Morphology

Nanostructured transition metal oxides have received special role in the production of the anode electrode in the lithium-ion batteries. In this research, a one stage method to synthesize Cr2O3/C hybrid microspheres via solvothermal method was reported. The XRD and SEM methods were used for characterization of products. The carbon content of synthesized samples was measured by TGA method. The results showed that only Cr2O3 peaks could be observed XRD patterns, and this indicated that the carbon in the composite was amorphous. The average crystallite size is calculated by using Williamson-Hall, 36 nm. The content of carbon in the composite was 63 wt.%. The SEM images showed that the surfaces of prepared spheres were relatively smooth and carbon microspheres had an average diameter of about 2 μm. The morphologies and sizes of the microspheres change with controlled by reaction conditions solvothermal and in the size range of 0.7-3.5 μm changes.