Facile synthesis of mesoporous MnO2 microspheres for high performance AC//MnO2 aqueous hybrid supercapacitors

	Facile synthesis of mesoporous MnO2 microspheres for high performance AC//MnO2 aqueous hybrid supercapacitors
	Li HH ; Zhang XD ; Ding R ; Qi L ; Wang HY
刊名	electrochimica acta
	2013
卷号	108 页码:497-505
关键词	ELECTROCHEMICAL CAPACITORS MANGANESE OXIDE ELECTRODE MATERIALS ANODIC DEPOSITION STORAGE PSEUDOCAPACITANCE ULTRACAPACITORS MECHANISM BEHAVIOR DIOXIDES
ISSN号	0013-4686
通讯作者	zhang xd
中文摘要	mesoporous manganese oxides (mno2) microspheres were synthesized by the first chemical deposition of manganese carbonate (mnco3) precursors at room temperature and followed by the low-temperature calcinations under 300,350 and 400 degrees c. the obtained mno2 materials exhibit the akhtenskite type mno2 crystalline microstructures and the microspherical morphologies with the diameter of about 1 mu m. the as-synthesized mno2 microspheres under 300 degrees c exhibit the largest specific area (240.5 m(2) g(-1)) and the optimal mesopore volume (0.231 cm(3) g(-1)) than the other two samples under 350 and 400 degrees c (111.4, 106.3 m(2) g(-1); 0.055, 0.021 cm(3) g(-1)), which contribute to the optimal electrochemical performances for supercapacitors. moreover, the as-synthesized mno2 microspheres under 300 degrees c possess the highest tap density (1.156 g cm(-3)) than the other two samples (1.126, 1.043 g cm(-3)), leading to the more feasibility for practical applications in supercapacitors. the as-fabricated mno2 electrode exhibits a high specific capacitance (129 f g(-1) at 0.25 a g(-1)) and high-rate capability (68 f g(-1) at 4a g(-1)). the as-assembled activated carbon (ac)//mno2 hybrid capacitor exhibits a wide working voltage (1.8v), high power and energy densities (2197 w kg(-1) and 12.8w h kg(-1) at 4 a g(-1)), excellent cycling behavior (94.3% capacitance retention after 5000 cycles at 1 a g(-1)), and excellent capacitance recovery performances under different rates (0.25-4 a g(-1)) for tested 4500 cycles, indicating the promising prospective of the easily fabricated mesoporous mno2 microspheres for practical applications in supercapacitors. (c) 2013 elsevier ltd. all rights reserved.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000328014000066
公开日期	2014-04-15
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/49558]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Li HH,Zhang XD,Ding R,et al. Facile synthesis of mesoporous MnO2 microspheres for high performance AC//MnO2 aqueous hybrid supercapacitors[J]. electrochimica acta,2013,108:497-505.
APA	Li HH,Zhang XD,Ding R,Qi L,&Wang HY.(2013).Facile synthesis of mesoporous MnO2 microspheres for high performance AC//MnO2 aqueous hybrid supercapacitors.electrochimica acta,108,497-505.
MLA	Li HH,et al."Facile synthesis of mesoporous MnO2 microspheres for high performance AC//MnO2 aqueous hybrid supercapacitors".electrochimica acta 108(2013):497-505.