Honeycomb porous MnO2 nanofibers assembled from radially grown nanosheets for aqueous supercapacitors with high working voltage and energy density

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	Honeycomb porous MnO2 nanofibers assembled from radially grown nanosheets for aqueous supercapacitors with high working voltage and energy density
	Zhao, L ; Yu, J ; Li, WJ ; Wang, SG ; Dai, CL ; Wu, JW ; Bai, XD ; Zhi, CY
刊名	NANO ENERGY
	2014
卷号	4 页码:39
关键词	Aqueous supercapacitor MnO2 Nanosheet Nanofiber Working voltage Energy density
ISSN号	2211-2855
通讯作者	Yu, J (reprint author), Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen Key Lab Adv Mat, Shenzhen Engn Lab Flexible Transparent Conduct Fi, Shenzhen 518055, Peoples R China.
中文摘要	Honeycomb porous MnO2 nanofibers (HMONFs) have been prepared by solution reaction between KMnO4 and electrospun carbon nanofibers (CNFs). The HMONFs are entirely composed of radially grown MnO2 nanosheets with thickness about 3-7 nm, which interconnect each other, forming the honeycomb pores. Formation of this unique structure occurs only at very low KMnO4 concentrations and sufficiently tong reaction time. The constituting MnO2 nanosheets in the HMONFs are well separated with the sheet edges oriented on the surface, leading to excellent supercapacitive performance. Symmetric aqueous supercapacitors are assembled using the HMONFs and 1 M Na2SO4 electrolyte, which exhibits a working voltage as high as 2.2 V and high energy density of 41.1 Wh/kg at the power density of 3.3 kW/kg. The supercapacitor capacity can be retained about 76% of its initial value after 3500 cycles, which is acceptable due to its high energy density. These results indicate that the HMONFs are of high promise in developing advanced supercapacitors with high working voltage and energy density for practical applications. (C) 2013 Elsevier Ltd. All rights reserved.
资助信息	National Basic Research Program of China [2012CB93300]; National Natural Science Foundation of China [51272057]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59335]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhao, L,Yu, J,Li, WJ,et al. Honeycomb porous MnO2 nanofibers assembled from radially grown nanosheets for aqueous supercapacitors with high working voltage and energy density[J]. NANO ENERGY,2014,4:39.
APA	Zhao, L.,Yu, J.,Li, WJ.,Wang, SG.,Dai, CL.,...&Zhi, CY.(2014).Honeycomb porous MnO2 nanofibers assembled from radially grown nanosheets for aqueous supercapacitors with high working voltage and energy density.NANO ENERGY,4,39.
MLA	Zhao, L,et al."Honeycomb porous MnO2 nanofibers assembled from radially grown nanosheets for aqueous supercapacitors with high working voltage and energy density".NANO ENERGY 4(2014):39.