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High Capacitance of Electrodeposited $MnO_2$ by the Effect of a Surface-Active Agent

Devaraj, S and Munichandraiah, N (2005) High Capacitance of Electrodeposited $MnO_2$ by the Effect of a Surface-Active Agent. In: Electrochemical and Solid-State Letters, 8 (7). A373-A377.

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Manganese dioxide has been electrochemically deposited on a Ni substrate from a neutral electrolyte in the presence of a surface-active agent, namely, sodium lauryl sulfate (SLS), for supercapacitor application. The potentiodynamically prepared oxide provides higher capacitance than the potentiostatically and galvanostatically prepared oxides. Owing to adsorption of the surfactant molecules at the interface during electrodeposition, the manganese dioxide possesses higher specific surface area. Specific capacitance of 310 F $g^-^1$ obtained for the oxide prepared in the presence of SLS over an extended charge-discharge cycling is higher by about 25% in relation to the oxide prepared in the absence of SLS.

Item Type: Journal Article
Publication: Electrochemical and Solid-State Letters
Publisher: Electrochemical Society
Additional Information: Copyright of this article belongs to Electrochemical Society.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 07 May 2007
Last Modified: 19 Sep 2010 04:37
URI: http://eprints.iisc.ac.in/id/eprint/10851

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