کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5358727 | 1503669 | 2014 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface-modified reduced graphene oxide electrodes for capacitors by ionic liquids and their electrochemical properties
ترجمه فارسی عنوان
الکترودهای گرافیتی کاهش یافته برای سطوح خازن توسط مایعات یونی و خواص الکتروشیمیایی آنها
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کلمات کلیدی
اصلاح سطح، مایعات یونی، کاهش اکسید گرافین، تجزیه و تحلیل الکتروشیمیایی، خازن
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
In this work, reduced graphene oxide (rGO)/ionic liquids (IL) composites with different weight ratios of IL to rGO were synthesized by a simple method. In these composites, IL contributed to the exfoliation of rGO sheets and to the improvement of the electrochemical properties of the resulting composites by enhancing the ion diffusion and charge transport. The structure of the composites was examined by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The TEM images showed that IL was coated on the surface of rGO in a translucent manner. The electrochemical analysis of the prepared composites was carried out by performing cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS). Among the prepared composites, the one with a weight ratio of rGO to IL of 1:7 showed the highest specific capacitance of 147.5Â FÂ gâ1 at a scan rate of 10Â mVÂ sâ1. In addition, the rate capability and cycle performance of the composites were enhanced compared to pristine rGO. These enhanced properties make the composites suitable as electrode materials for the better performance supercapacitors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 295, 15 March 2014, Pages 31-37
Journal: Applied Surface Science - Volume 295, 15 March 2014, Pages 31-37
نویسندگان
Jieun Kim, Seok Kim,