Nano Archive

Facile approach to prepare loose-packed cobalt hydroxide nano-flakes materials for electrochemical capacitors

Lang, Jun-Wei and Liu, Min and Kong, Ling-Bin (2009) Facile approach to prepare loose-packed cobalt hydroxide nano-flakes materials for electrochemical capacitors. Journal of Power Sources, 194 (2). pp. 1194-1210. ISSN 0378-7753

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Abstract

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 g-1 can be achieved in 2 M aqueous KOH with the potential range from -0.2 to 0.4 V (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. [All rights reserved Elsevier

Item Type:Article
Uncontrolled Keywords:loose-packed cobalt hydroxide nano-flakes materials; electrochemical capacitors; facile chemical precipitation; cyclic voltammetry; chronopotentiometry; impedance spectroscopy
Subjects:Material Science > Nanochemistry
ID Code:7193
Deposited By:CSMNT
Deposited On:29 Sep 2009 13:58
Last Modified:29 Sep 2009 13:58

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