Oxidation of metallic Mn thin films prepared in butyimethylpyrrolidinium bis(trifluoromethyisuifony)imide ionic liquid and the pseudo-capacitive performance of the anodized oxide electrodes

Jeng Kuei Chang, Chiung Hui Huang, Wen Ta Tsai, I. Wen Sun, Po Yu Chen

研究成果: Conference contribution

3 引文 斯高帕斯(Scopus)

摘要

Metallic Manganese (Mn) thin films were successfully prepared by electrodeposition in butylmethylpyrrolidinium bis(trifluoromethylsulfony)imide (BMP-NTf2) ionic liquid, which has a very wide potential window extending over the reduction potential of Mn. Potentiostatic, galvanostatic, and cyclic voltammetric methods were performed to anodize the Mn films in Na 2SO4 solution. The surface morphology and crystal structure of the obtained oxides were examined by a scanning electron microscope and X-ray diffractometer, respectively. Moreover, their chemical states were also analyzed with an X-ray photoelectron spectroscopy. It was clearly confirmed that the anodization methods could affect the material characteristics of the Mn oxides and therefore their pseudo-capacitive performance. The Mn oxide anodized by the cyclic voltammetric method showed a promising specific capacitance of 355 F/g (measured in 0.1 M Na2SO4 solution at a potential scan rate of 25 mV/s). Its capacitance retained ratio after 500 charge-discharge cycles was as high as 94 %.

原文English
主出版物標題ECS Transactions - Electrochemistry of Novel Electrode Materials for Energy Conversion and Storage
頁面165-174
頁數10
版本25
DOIs
出版狀態Published - 2008 十二月 22
事件Electrochemistry of Novel Electrode Materials for Energy Conversion and Storage - 211th ECS Meeting - Chicago, IL, United States
持續時間: 2007 五月 62007 五月 11

出版系列

名字ECS Transactions
號碼25
6
ISSN(列印)1938-5862
ISSN(電子)1938-6737

Other

OtherElectrochemistry of Novel Electrode Materials for Energy Conversion and Storage - 211th ECS Meeting
國家United States
城市Chicago, IL
期間07-05-0607-05-11

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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