%0 Journal Article
%T Preparation and Electrochemical Capacitance of α-Ni(OH)2 Synthesized by Microwave-assisted Hydrothermal Method
%A XIAN Qing-Long
%A LI Juan
%J 无机材料学报
%D 2010
%I Science Press
%R 10.3724/sp.j.1077.2010.01268
%X Ni(OH)2 particles were successfully prepared with Ni(NO3)2·6H2O as the raw material and CO(NH2)2 as the precipitation agent by microwave-assisted hydrothermal method. The obtained Ni(OH)2 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and electrochemical measurements. XRD results showed that the as-prepared Ni(OH)2 particles had the typical α-phase. The SEM images revealed that the synthesized α-Ni(OH)2 particles were well dispersed and ball-flower like with diameters of 0.5-3 μm which consisted of the aggregated flakes. Electrochemical properties were studied by cyclic voltammograms (CV) and galvanostatic charge-discharge tests in 6 mol/L KOH electrolyte. All the tests showed that the reactants ratio affected the morphologies and the electrochemical capacitance of the materials. When the molar ratio of the CO(NH2)2 to Ni(NO3)2·6H2O was 3:1, the obtained α-Ni(OH)2 had the maximal initial special capacity; when the molar ratio was 2:1, the α-Ni(OH)2 had the best cycle storage performance.
%K microwave-assisted hydrothermal method
%K α-Ni(OH)2
%K supercapacitor
%U http://www.jim.org.cn/fileup/PDF/20101207.pdf