Wu C.-H.Ma J.-S.Lu C.-H.2019-05-132019-05-13201215671739https://scholars.lib.ntu.edu.tw/handle/123456789/407397Manganese oxide powders with high specific capacitance were successfully fabricated via a simple redox reaction at room temperature. The reducing agents used for the redox reaction significantly affected the oxidation states and the electrochemical properties of the prepared manganese oxide powders. As C 2H 5OH was used as the reducing agent, high Mn 3 content and high amount of hydroxide were observed in the prepared manganese oxide powders. In addition, the molar ratios of KMnO 4 and C 2H 5OH also influenced the electrochemical properties of the prepared manganese oxide powders. When the molar ratio of KMnO 4 and C 2H 5OH was 1:40, the specific capacitance of the prepared manganese oxide was as high as 402 F/g. These results of the electrochemical analysis showed that, adjusting the molar ratios of KMnO 4 and C 2H 5OH demonstrated to be an effective method for controlling the electrochemical characteristics of manganese oxide powders. ? 2011 Elsevier B.V. All rights reserved.CapacitanceManganese oxideRedox reactionjournal article10.1016/j.cap.2012.01.0072-s2.0-84862782279https://www.scopus.com/inward/record.uri?eid=2-s2.0-84862782279&doi=10.1016%2fj.cap.2012.01.007&partnerID=40&md5=7be8e83b5d935ef0d4f85bbfc5be134c