کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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186845 | 459624 | 2013 | 7 صفحه PDF | دانلود رایگان |
A facile solvothermal technique is developed to prepare a nickel oxide precursor which is subsequently calcined in air at 300 °C for 4 h to convert it to NiO nanospheres. These nanospheres are assembled from ultrathin mesoporous nanosheets that possess high surface areas. The final product is characterized by various techniques: thermogravimetric analysis, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron spectroscopy, and nitrogen adsorption–desorption method. Such a highly desired structure with a great surface area of 213 m2/g is believed to be formed through the Ostwald ripening mechanism. Electrochemical measurements show that our electrode can exhibit a high specific capacitance of 803 F g−1 at a discharge current density of 2 A g−1. The electrode also possesses excellent long-term stability in an alkaline electrolyte. These interesting properties promote it to be a potential supercapacitor electrode material.
Journal: Electrochimica Acta - Volume 108, 1 October 2013, Pages 617–623