Facile synthesis of MnO2/CNTs composite for supercapacitor electrodes with long cycle stability

doi:10.1021/jp505744p

	Facile synthesis of MnO2/CNTs composite for supercapacitor electrodes with long cycle stability
	Li, Li 1,2; Hu, Zhong A.1; An, Ning 1; Yang, Yu Y.1; Li, Zhi M.1; Wu, Hong Y.1
	2014-10-09
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	118 期号:40 页码:22865-22872
摘要	The MnO2/carbon nanotubes (CNTs) composites were prepared through a modified one-pot reaction process, in which CNTs were coated by cross-linked MnO2 flakes uniformly. The composition, morphology, and microstructure of the products were characterized using TG, XRD, XPS, Raman, FESEM, TEM, and STEM. It reveals that the MnO2 layer stands on the sidewalls of the inner nanotubes uniformly about 50 nm thick, and the loading of MnO2 on the CNTs reaches 84%. Furthermore, the supercapacitive performances were investigated by cyclic voltammogram (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS). The experimental results indicate that the composite exhibits not only high specific capacitance of 201 F g-1 and rate capability (the specific capacitance at 20 A g-1 is 70% of that at 1 A g-1), but also excellent cycle stability (no obvious capacitance decay after 10 000 cycles at 1 A g-1). An asymmetric electrochemical capacitor was assembled by using the obtained MnO2/CNTs composite as positive electrode and activated carbon (AC) as negative electrode. The as-assembled AC//MnO2/CNTs capacitor can cycle reversibly in a voltage of 0-1.5 V and give a high energy density of 13.3 Wh kg-1 at a power density of 600 W kg-1. © 2014 American Chemical Society.
关键词	Activated carbon Capacitance Carbon nanotubes Crosslinking Electric discharges Electrochemical impedance spectroscopy Manganese oxide Morphology Supercapacitor Cyclic voltammograms Electrochemical capacitor Galvanostatic charge discharges High energy densities High specific capacitances Positive electrodes Specific capacitance Supercapacitor electrodes
DOI	10.1021/jp505744p
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000343016800006
出版者	American Chemical Society
EI入藏号	20144400138097
EI主题词	Electrochemical electrodes
EI分类号	701.1 Electricity: Basic Concepts and Phenomena ; 761 Nanotechnology ; 801 Chemistry ; 802.2 Chemical Reactions ; 804 Chemical Products Generally ; 951 Materials Science
原始文献类型	Journal article (JA)
引用统计	被引频次：360[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.nwnu.edu.cn/handle/39RV6HYL/30852
专题	实体学院_化学化工学院_化工系实体学院_化学化工学院
通讯作者	Hu, Zhong A.
作者单位	1.Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Polymer Mat Gansu Prov, Key Lab Ecoenvironm Related Polymer Mat,Minist Ed, Lanzhou 730070, Gansu, Peoples R China; 2.Northwest Univ Nationalities, Coll Chem Engn, Lanzhou 730030, Gansu, Peoples R China
第一作者单位	化工系
通讯作者单位	化工系
第一作者的第一单位	化工系
推荐引用方式 GB/T 7714	Li, Li,Hu, Zhong A.,An, Ning,et al. Facile synthesis of MnO2/CNTs composite for supercapacitor electrodes with long cycle stability[J]. Journal of Physical Chemistry C,2014,118(40):22865-22872.
APA	Li, Li,Hu, Zhong A.,An, Ning,Yang, Yu Y.,Li, Zhi M.,&Wu, Hong Y..(2014).Facile synthesis of MnO2/CNTs composite for supercapacitor electrodes with long cycle stability.Journal of Physical Chemistry C,118(40),22865-22872.
MLA	Li, Li,et al."Facile synthesis of MnO2/CNTs composite for supercapacitor electrodes with long cycle stability".Journal of Physical Chemistry C 118.40(2014):22865-22872.

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