کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7734056 | 1497953 | 2015 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrothermal deposition of manganese dioxide nanosheets on electrodeposited graphene covered nickel foam as a high-performance electrode for supercapacitors
ترجمه فارسی عنوان
رسوب هیدروترمال نانو ذرات دی اکسید منگنز بر روی گرافن الکترودهایی فوم نیکل پوشش داده شده به عنوان یک الکترود با کارایی بالا برای مخازن فوق
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
In this paper, the graphene oxide nanosheets are simultaneously reduced and deposited on nickel foam (denoted as Ni-foam@GNS) by one step electrodeposition method. The interconnected crumpled graphene nanosheets grown on Ni foam serve as a three-dimensional (3D) conductive skeleton for hydrothermal deposition of MnO2 nanosheets by in-situ redox reaction. The MnO2 nanosheets anchored on the graphene covered nickel foam (denoted as Ni-foam@GNS@MnO2) show unique 3D porous interconnected networks. The samples are characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), N2 adsorption-desorption measurements and fourier transform infrared spectroscopy (FT-IR). The capacitive performances are researched by cyclic voltammetry (CV), galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS). The results reveal that the Ni-foam@GNS@MnO2 electrode exhibits a high specific capacitance of 462 F gâ1 at 0.5 A gâ1 and excellent capacitance retention of 93.1% after 5000 cycles at 10 A gâ1. Furthermore, the Ni-foam@GNS@MnO2 electrode delivers a high energy density of 26.1 Wh kgâ1 even at a high power density of 3981 W kgâ1. These results demonstrate that the Ni-foam@GNS@MnO2 composite offers great promise in large-scale energy storage device applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 279, 1 April 2015, Pages 138-145
Journal: Journal of Power Sources - Volume 279, 1 April 2015, Pages 138-145
نویسندگان
Yiju Li, Dianxue Cao, Ying Wang, Sainan Yang, Dongming Zhang, Ke Ye, Kui Cheng, Jinling Yin, Guiling Wang, Yang Xu,