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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）。
Author NameAffiliationPostcode
LI Yao Guangxi Vocational & Technical Institute of Industry， Nanning， Guangxi Zhuang Autonomous Region， 530001 530001
ZHAO Siyu College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
FAN Hanhan College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
SONG Xueping College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
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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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