کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1332459 | 979042 | 2010 | 8 صفحه PDF | دانلود رایگان |
Highly uniform, porous β-Co(OH)2 nanostructures with an appearance reminding of certain spherical corals were synthesized via a facile, one-step hydrothermal route using ethanol–water mixtures as solvents. The rough surfaces of the nanostructures consist of numerous randomly distributed, interconnecting nanoflakes, resulting in a network-like structure with many cavities. The coral-like product has a high Brunauer–Emmet–Teller specific surface area of 163 m2/g. The diameter of the coral-like β-Co(OH)2 nanostructures is adjustable from 800 nm to 2 μm. The effects of the ethanol/water ratio, the Co2+ concentration, the hydrothermal temperature, and the reaction time on the formation of the coral-like structures were investigated. Cyclic voltammetry and galvanostatic charge–discharge tests show that the β-Co(OH)2 possesses excellent capacitive properties. This is mainly attributed to the high porosity, which allows a deep penetration by electrolytes.
Coral-like β-Co(OH)2 nanostructures were synthesized via a facile ethanol-assisted hydrothermal route. Their high porosity facilitates a deep penetration by electrolytes and thus contributes to the excellent capacitive properties.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 183, Issue 9, September 2010, Pages 2166–2173