کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
186390 459613 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and electrochemical property of ionic liquid-attached graphene nanosheets for an application of supercapacitor electrode
ترجمه فارسی عنوان
خواص آماده سازی و الکتروشیمیایی نانوساختارهای گرافن مونوئید یونیک برای کاربرد الکترودهای سوپرکاپاسیون
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

In this study, graphene nanosheets (GNS) were modified by 1-Butyl-3-methylimidazolium hexafluorophosphate, which is one of Ionic Liquid (IL). Owing to the modification of graphene with ionic liquids, graphene can not only be structurally stabilized, but also showed the higher charge transfer that is favor to exhibit an enhanced electrochemical performance. Also, a graphene aggregation by the intersheet van der Waals interaction can be prevented because ionic liquids act as an effective agent for the exfoliation of graphene sheets. The structural analysis of prepared composites was confirmed by transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR) and X-ray diffractometer (XRD). The electrochemical properties are studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The GNS/IL composites show a high specific capacitance (114 Fg−1) compared to pristine graphene (99 Fg−1) at 10 mVs−1 in 6 M KOH electrolyte. Also, the prepared composites showed the enhanced electrochemical performance such as high rate capability and excellent cycle performance. Therefore, the prepared composites could be a candidate of electrode materials for supercapacitors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 119, 10 February 2014, Pages 11–15
نویسندگان
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