Three-dimensional flowerlike α-Ni（OH）2 nanostructures were successfully synthesized by the microwave-assisted reflux as short as 30 rain. The crystalline structure and morphology of the products were characterized ...Three-dimensional flowerlike α-Ni（OH）2 nanostructures were successfully synthesized by the microwave-assisted reflux as short as 30 rain. The crystalline structure and morphology of the products were characterized by X-ray diffraction, N2 adsorption-desorption isotherms, field emission scanning electron microscopy, and transmission electron microscopy. The α-Ni（OH）2 nanostructure shows a large surface area of 173 m2 g-1 and narrow mesopore distribution. The electrochemical properties of the as-prepared α-Ni（OH）2 as an electrode material for supercapacitor were investigated by cyclic voltammetry and galvanostatic charge-discharge measurements in 6 mol/L KOH electrolyte. The α-Ni（OH）2 nanostructure shows a maximum specific capacitance of 2030 F g-1 at a current density of 1 A g-1 and exhibits excellent rate capability. These results suggest that it is a promising electrode material for supercapacitor application.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.51472238)the Open Project Program of State Key Laboratory of Chemical Resource Engineering(Grant No.CRE-2014-C-102)
文摘Three-dimensional flowerlike α-Ni（OH）2 nanostructures were successfully synthesized by the microwave-assisted reflux as short as 30 rain. The crystalline structure and morphology of the products were characterized by X-ray diffraction, N2 adsorption-desorption isotherms, field emission scanning electron microscopy, and transmission electron microscopy. The α-Ni（OH）2 nanostructure shows a large surface area of 173 m2 g-1 and narrow mesopore distribution. The electrochemical properties of the as-prepared α-Ni（OH）2 as an electrode material for supercapacitor were investigated by cyclic voltammetry and galvanostatic charge-discharge measurements in 6 mol/L KOH electrolyte. The α-Ni（OH）2 nanostructure shows a maximum specific capacitance of 2030 F g-1 at a current density of 1 A g-1 and exhibits excellent rate capability. These results suggest that it is a promising electrode material for supercapacitor application.
