کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1269216 1497435 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microwave-assisted in situ synthesis of cobalt nanoparticles decorated on reduced graphene oxide as promising electrodes for supercapacitors
ترجمه فارسی عنوان
ترکیبات نانو ذرات کبالت با استفاده از مایکروویو، به کمک اکسید گرافن کاهش یافته به عنوان الکترودهای امیدوار کننده برای سازندگان ابر
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Co/RGO composites were successfully prepared via a facile microwave-assisted route.
• Co/RGO composites show much high specific capacitances and good rate capacity.
• The superior electrochemical performance is due to the synergetic effect of RGO and Co particles.

A series of cobalt nanoparticles/reduced graphene oxide (Co/RGO) composites have been successfully synthesized via a facile microwave-assisted synthetic route for the first time. The synthesized composites are comprised of Co particles that are uniformly anchored onto the surface of graphene sheets by in situ reducing. Powder X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), Raman spectroscopy, Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), and Brunauer-Emmett-Teller (BET) analysis are performed for systematically characterizing the microstructure and composition of the as-prepared Co/RGO composites. Interestingly, the as-prepared composites show superior electrochemical performance to their counterparts of Co and RGO as electrodes for supercapacitors. As a result, Co/RGO-15 composite exhibits a high specific capacitance of 370.7 F g−1 at 5 mV s−1 in 2 M KOH aqueous solution as well as good rate capability. The excellent electrochemical performances are due to the 3D graphene conductive network and the synergetic effect of RGO and Co particles. Meanwhile, the capacitance retention keeps about 92.3% of the initial value after 2000 cycles at a current density of 2 A g−1, suggesting that such hybrid electrode possesses a great potential application in energy-storage devices.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 38, 15 October 2015, Pages 13003–13013
نویسندگان
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