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Preparation of α-MnO2@ZAC Activated Carbon Composite and Its Electrochemical Properties |
Received:August 21, 2020 |
DOI:10.11980/j.issn.0254-508X.2021.02.004 |
Key Words:manganese dioxide activated carbon composite materials supercapacitors electrochemical properties |
Fund Project:2018年广西工业职业技术学院科研立项项目和国家自然科学基金项目(21766002)。 |
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Abstract:In this study, one-dimensional α-MnO2 was deposited on the surface of ZAC by hydrothermal method with bagasse as raw material and activated carbon (ZAC) prepared by ZnCl2 activation method as the conductive substrate, and the effects of different deposits of α-MnO2 on the electrochemical performance of composite materials were studied. The results of XPS and EA showed that Mn was successfully doped on the surface of ZAC, and the content of Mn doped was decreased from 29.78% to 5.57% with the increase of ZAC proportion in composite. The results of XRD and Raman showed that the surface of ZAC was hydrothermally deposited with one-dimensional tunnel structure nanorod-shaped α-MnO2,and a series of composite materials with graphite structure were prepared. Among them, MnZAC-4 had the largest specific capacitance of 327 F/g, its specific capacitance could still maintain 88.2% after 1000 cycles, and the electrochemical impedance was small. In addition, according to the results of TEM, XRD and Raman, the preparation mechanism of α-MnO2@ZAC composites by hydrothermal deposition method was discussed. |
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