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Materials 2014, 7(1), 265-274; doi:10.3390/ma7010265
Article

Electrodeposition of Manganese-Nickel Oxide Films on a Graphite Sheet for Electrochemical Capacitor Applications

1
,
2
 and
1,*
1 Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea 2 Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Korea
* Author to whom correspondence should be addressed.
Received: 15 November 2013 / Revised: 26 December 2013 / Accepted: 30 December 2013 / Published: 9 January 2014
(This article belongs to the Section Materials for Energy Applications)
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Abstract

Manganese-nickel (Mn-Ni) oxide films were electrodeposited on a graphite sheet in a bath consisting of manganese acetate and nickel chloride, and the structural, morphological, and electrochemical properties of these films were investigated. The electrodeposited Mn-Ni oxide films had porous structures covered with nanofibers. The X-ray diffractometer pattern revealed the presence of separate manganese oxide (g-MnO2) and nickel oxide (NiO) in the films. The electrodeposited Mn-Ni oxide electrode exhibited a specific capacitance of 424 F/g in Na2SO4 electrolyte. This electrode maintained 86% of its initial specific capacitance over 2000 cycles of the charge-discharge operation, showing good cycling stability.
Keywords: Mn-Ni oxide films; electrodeposition; supercapacitor; specific capacitance; cycling stability Mn-Ni oxide films; electrodeposition; supercapacitor; specific capacitance; cycling stability
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Lee, H.-M.; Lee, K.; Kim, C.-K. Electrodeposition of Manganese-Nickel Oxide Films on a Graphite Sheet for Electrochemical Capacitor Applications. Materials 2014, 7, 265-274.

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