کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6612678 | 459584 | 2014 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile synthesis of reduced graphene oxide/CoWO4 nanocomposites with enhanced electrochemical performances for supercapacitors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Facile synthesis of reduced graphene oxide/CoWO4 nanocomposites with enhanced electrochemical performances for supercapacitors Facile synthesis of reduced graphene oxide/CoWO4 nanocomposites with enhanced electrochemical performances for supercapacitors](/preview/png/6612678.png)
چکیده انگلیسی
A facile one-pot hydrothermal method was provided for synthesis of the reduced graphene oxide-cobalt tungstate (RGO/CoWO4) nanocomposites with the enhanced electrochemical performances for supercapacitors for the first time. The resulting nanocomposites are comprised of CoWO4 nanospheres that are well-anchored on graphene sheets by in situ reducing. The prepared RGO/CoWO4 nanocomposites have been thoroughly characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy, Thermogravimetric analysis, Scanning electron microscopy, Transmission electron microscopy, X-ray photoelectron spectroscopy, and N2 adsorption-desorption. Importantly, the prepared nanocomposites exhibit superior electrochemical performance to CoWO4 as electrodes for supercapacitors. As a result, RGO/CoWO4 nanocomposites with 91.6Â wt% CoWO4 content achieved a specific capacitance about 159.9Â FÂ gâ1 calculated from the CV curves at 5Â mVÂ sâ1, which was higher than that of CoWO4 (60.6Â FÂ gâ1). The good electrochemical performance can be attributed to the increased electrical conductivity and the creation of new active sites due to the synergetic effect of RGO and CoWO4 nanospheres. The cyclic stability tests demonstrated capacitance retention of about 94.7% after 1000 cycles, suggesting the potential application of RGO/CoWO4 nanocomposites in energy-storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 150, 20 December 2014, Pages 23-34
Journal: Electrochimica Acta - Volume 150, 20 December 2014, Pages 23-34
نویسندگان
Xiaowei Xu, Jianfeng Shen, Na Li, Mingxin Ye,