Facile synthesis and capacitive characteristics of Co(OH)2 nanoflakes via a solid-reaction route at room temperature |
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| Authors: | Liangyu Gong Xiaohong Liu |
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| Affiliation: | College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Shandong 266109, PR China |
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| Abstract: | Flake-like β-Co(OH)2 with dimension around 20-50 nm was conveniently synthesized via a simple, low cost and practical room-temperature solid-state reaction with the assistance of polyethylene glycol (PEG) 400 and its electrochemical properties were evaluated using cyclic voltammetry (CV) and galvanostatic charge-discharge technology. A high specific capacitance of 658.4 F g− 1 at 5 mA was observed for the β-Co(OH)2 nanoflakes, compared to 302.7 F g− 1 for the block-like β-Co(OH)2 obtained without the PEG-400, showing the morphological function of nanoflakes for improving the capacitive performance. Furthermore, the β-Co(OH)2 nanoflakes can offer a good specific capacitance retention of ca. 80% after 1000 cycles, suggesting its potential application in supercapacitors. |
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| Keywords: | Room-temperature solid-state reaction Cobalt hydroxide Nanoparticles Morphological function Electrical properties |
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