Synthesis of Microspheres Cr2O3/C by Changing the Synthesis’ Parameters and Evaluation of Electrochemical Properties of Microspheres

Subject Areas : journal of New Materials

A.H Asrari ¹ , بهروز Shayegh Boroujeny ² , حمید Safarzadeh ³

1 - دانشگاه نجف آباد
2 - استادیار، دانشکده فنی و مهندسی دانشگاه شهرکرد، شهرکرد، ایران
3 - مرکز تحقیقات مواد پیشرفته، دانشکده مهندسی مواد، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران

Received: 2016-01-10 Accepted : 2018-03-01 Published : 2018-02-20

Keywords:

Abstract :

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/Chybrid microspheres via solvothermal method was reported. The XRD and SEM methods were used for characterization of products. The Carbon content of synthesized samples were 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 Solvothermaland in the size range of 0.7-3/5 microns changes. Electrochemical impedance in KOH solution for Cr₂O₃/C indicates a good behavior Capacitive to materials. Cr₂O₃. Improve the electrochemical properties of the composite can be attributed to amorphous carbon.

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