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Facile approach to prepare loose-packed cobalt hydroxide nano-flakes materials for electrochemical capacitors
作者:Ling-Bin Kong*, Jun-Wei Lang, Min Liu, Yong-Chun Luo, Long Kang.
關鍵字:Electrochemical capacitors, Cobalt hydroxide, Specific capacitance, Nano-flakes, Pseudo-capacitance
論文來源:期刊
具體來源:Journal of Power Sources, 2009, 194(2): 1194-1201.
發(fā)表時間:2009年
Cobalt hydroxide nano-flakes are successfully synthesized by a facile chemical precipitation method. Electrochemical characterization is performed using cyclic voltammetry, chronopotentiometry and impedance spectroscopy, respectively. These cobalt hydroxide nano-flakes maintain high utilization at high rates of discharge. A maximum specific capacitance of 735 F g1 can be achieved in 2M aqueous KOH with the potential range from 0.2 to 0.4V (vs. SCE) in a half-cell setup configuration for the nano-flakes Co(OH)2 electrode, suggesting its potential application in electrochemical capacitors. Furthermore, the effect of annealing temperatures on the electrochemical capacitance characteristics is also been systematically explored.
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