Synthesis of γ-MnO2/PANI Composites for Supercapacitor Application in Acidic Electrolyte

doi:10.1149/1945-7111/abef82

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	Synthesis of γ-MnO2/PANI Composites for Supercapacitor Application in Acidic Electrolyte
	Zhu, Yuanqiang; Xu, Hui; Tang, Jing; Jiang, Xudong; Bao, Yuanhai; Chen, Yong
刊名	Journal of the Electrochemical Society
	2021-03-01
卷号	168 期号:3
关键词	Capacitance Cyclic voltammetry Electric discharges Electrochemical impedance spectroscopy Electrodes Electrolytic capacitors Manganese oxide Sulfuric acid Supercapacitor Asymmetric supercapacitor Capacitance performance Electrochemical activities Electrochemical performance Galvanostatic charge discharges High energy densities In-situ polymerization Supercapacitor application
ISSN号	0013-4651
DOI	10.1149/1945-7111/abef82
英文摘要	In this paper, γ-MnO2 was prepared via simple hydrothermal method and chosen to compound γ-MnO2/polyaniline (PANI) composite electrode by in situ polymerization. The electrochemical performances of as-prepared samples were explored in acidic and neutral medium, respectively. And influenced its effects such as the different additions of composites, scan rates, and current densities in 0.5 M H2SO4 electrolyte were further investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), electrochemical impedance spectroscopy (EIS), respectively. The good capactive behaviours indicated that the γ-MnO2 in the conductive matrix of PANI restrains them from dissolution in acidic electrolyte, and PANI itself affords an additional electrochemical activity to the composite. A asymmetric supercapacitor was fabricated using γ-MnO2/PANI as the positive electrode and activated carbon (AC) as the negative electrode. It displayed good capacitance performance of 232.1 F g-1 and high energy density 66.4 Wh kg-1 at a power density of 350.1 W Kg-1, as well as good cycling life (maintaining 78.65% initial capacitance after 3000 cycles). The enhanced electrochemical performances implie that the γ-MnO2/PANI composite can be potentially applied in superca-pacitors. © 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
WOS研究方向	Electrochemistry ; Materials Science
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000636146000001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148449]
专题	石油化工学院
作者单位	College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhu, Yuanqiang,Xu, Hui,Tang, Jing,et al. Synthesis of γ-MnO2/PANI Composites for Supercapacitor Application in Acidic Electrolyte[J]. Journal of the Electrochemical Society,2021,168(3).
APA	Zhu, Yuanqiang,Xu, Hui,Tang, Jing,Jiang, Xudong,Bao, Yuanhai,&Chen, Yong.(2021).Synthesis of γ-MnO2/PANI Composites for Supercapacitor Application in Acidic Electrolyte.Journal of the Electrochemical Society,168(3).
MLA	Zhu, Yuanqiang,et al."Synthesis of γ-MnO2/PANI Composites for Supercapacitor Application in Acidic Electrolyte".Journal of the Electrochemical Society 168.3(2021).