Application of Chromium Tungsten/Reduced Graphene Oxide as an advanced electrode material for supercapacitors

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 447

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شناسه ملی سند علمی:

IRANCC20_262

تاریخ نمایه سازی: 28 اردیبهشت 1398

چکیده مقاله:

A composite of reduced graphene oxide (RGO) with nano-sized chromium tungstate (Cr2(WO6)) was prepared using a sonochemical method. The prepared Cr2(WO6)/RGO samples were assessed through field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and FT-IR spectroscopy to obtain chemical, structural and morphological information. The resulting composite (Cr2(WO6)/RGO) was evaluated as a candidate for building supercapacitor electrodes. In this line the electrochemical performance of the tested materials were studied through cyclic voltammetry (CV), galvanostatic charge/discharge, electrochemical impedance spectroscopy (EIS), and continues cyclic voltammetry (CCV). The electrochemical tests were performed using 2 M H2SO4 solutions as the electrolyte. The evaluations on Cr2(WO6)/RGO-based electrodes revealed the material to have a specific capacitance of 473 F g-1 at a scan rate of 5 mV s-1, an energy density of 61 W h kg-1, and a high rate capability. Continues cyclic voltammetry evaluations using Cr2(WO6)/RGO-based electrodes proved the electrodes to be capable of maintaining almost 98% of its initial SC after 4000 cycles. Based on the electrochemical evaluations the synthesized nanocomposite was proven to possess the merits of both of its ingredients.

نویسندگان

Kourosh Adib

Department of Chemistry, Faculty of Basic Sciences, Azarbaijan Shahid Madani University,Tabriz, Iran,Department of Chemistry, Faculty of Basic Sciences, Imam Hossein University, Tehran, Iran

Zolfaghar Rezvani

Department of Chemistry, Faculty of Basic Sciences, Azarbaijan Shahid Madani University,Tabriz, Iran

Mehdi Rahimi-Nasrabadi

Faculty of Pharmacy, Baghiatallah University of Medical Sciences, Tehran, Iran