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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23622

Title: Supercapacitive Properties of Spray Pyrolyzed Iron-added Manganese Oxide Powders Deposited by Electrophoretic Deposition Technique
Authors: Sheng-Chang Wang;Chin-Yi Chen;Tzu-Chin Chien;Pee-Yew Lee;Chung-Kwei Lin
Contributors: NTOU:Institute of Materials Engineering
Keywords: Manganeseoxide;Iron;Spray pyrolysis;Electrophoreticdeposition;Cyclic voltammetry;Cycling efficiency;Supercapacitor
Date: 2008-12-01
Issue Date: 2011-10-20T08:06:49Z
Publisher: Thin Solid Films
Abstract: Abstract:Nanocrystalline iron-addedmanganeseoxidepowders were prepared by spray pyrolysis (SP) from manganese acetate and iron nitrate solutions at 400 °C. The as-obtained powders were subsequently deposited onto graphite substrates via an electrophoreticdepositiontechnique (EPD). The as-prepared powders were examined by transmission electron microscopy (TEM) and X-ray diffractometry (XRD); the electrochemical properties of the coatings were further examined by cycling voltammetry (CV). Structural investigation by TEM and XRD revealed that the as-deposited coatings exhibited Mn3O4 phase with nanocrystalline structure. CV examinations showed that the iron addition significantly improved the electrochemical properties of the Mn-oxidepowder coatings. The specific capacitance of as-deposited Mn-oxide coating was increased from 202 F/g to 232 F/g when 2 at.% of iron was added. Even after 1200 cycles of life test, the iron-added coatings exhibited higher cycling efficiency (~ 78% of the initial maximum capacitance) than that unadded one (~ 60% of its maximum value).
Relation: 517(3), pp.1234-1238
URI: http://ntour.ntou.edu.tw/handle/987654321/23622
Appears in Collections:[材料工程研究所] 期刊論文

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