Facile synthesis of MnO2/CNTs composite for supercapacitor electrodes with long cycle stability
Li, Li1,2; Hu, Zhong A.1; An, Ning1; Yang, Yu Y.1; Li, Zhi M.1; Wu, Hong Y.1
Source PublicationJournal of Physical Chemistry C
AbstractThe 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.
KeywordActivated 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
Indexed ByEI ; SCIE
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000343016800006
PublisherAmerican Chemical Society
EI Accession Number20144400138097
EI KeywordsElectrochemical electrodes
EI Classification Number701.1 Electricity: Basic Concepts and Phenomena ; 761 Nanotechnology ; 801 Chemistry ; 802.2 Chemical Reactions ; 804 Chemical Products Generally ; 951 Materials Science
Original Document TypeJournal article (JA)
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Cited Times:349[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorHu, Zhong A.
Affiliation1.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
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Recommended Citation
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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