Preparation, structural and electrochemical supercapacitive properties of sprayed manganese oxide film electrode

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• 作者：P. D. More ; P. R. Jadhav ; S. M. Ingole…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：707-714
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

Manganese oxide (Mn₃O₄) thin films were deposited by spray pyrolysis technique at optimized temperature 400 °C. The hausmannite tetragonal crystal structure of Mn₃O₄ was confirmed by X-ray diffraction. The average grain size was found to be 70 nm for (301) prominent plane. Scanning electron micrographs revealed that material has high degree of porosity useful for supercapacitor application. The atomic force microscopy analysis showed that the surface morphology is rough. The electrochemical performance of Mn₃O₄ electrode tested using cyclic voltammetry at 0.25, 0.5 and 1 M molar of Na₂SO₄ electrolyte within the potential range of −1.6 to +1 V. Among the above molarities, 1 M Na₂SO₄ electrolyte showed high specific capacitance of 527 F g−1 at low scan rate of 5 mV s−1. The obtained specific energy, specific power and coulomb efficiency of Mn₃O₄ electrode were 6.52 Wh kg−1, 4.5 kW kg−1 and 89.94 %, respectively.