Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 500, Issue 1, Pages 102-107Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.04.001
Keywords
Electrode material; Oxide materials; Ionic conduction; Microstructure; Oxidation
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Funding
- National Science Council of the Republic of China, Taiwan [NSC95-2221-E-006-189]
- Promoting Academic Excellence & Developing World Class Research Center [D96-2700]
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A nanoscale hydrous manganese oxide used as an electrode in a supercapacitor was deposited onto a titanium substrate from an aqueous manganese acetate solution using the hydrothermal electrochemical method. The effect of deposition temperature on the characteristics of the manganese oxides was investigated. The capacitive characteristics of the manganese oxides were measured in sulfate electrolytes with various cations using cyclic voltammetry. The capacitive performances of the manganese oxide electrodes depend on the deposition temperature as well as the cations of electrolytes. A maximum capacitance of 244 Fg(-1) was obtained in Na2SO4 solution. The stability of manganese oxide was examined: after 1000 cycles, 80% of the initial capacitance remained. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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