Layered manganese oxides-decorated and nickel foam-supported carbon nanotubes as advanced binder-free supercapacitor electrodes

Ming Huang, Rui Mi, Hao Liu, Fei Li, Xiao Li Zhao, Wei Zhang, Shi Xuan He, Yu Xin Zhang

Research output: Contribution to journalArticlepeer-review

117 Scopus citations

Abstract

Three-dimensional carbon nanotubes@MnO2 core-shell nanostructures grown on Ni foam for binder-free capacitor electrodes have been fabricated by a floating catalyst chemical vapor deposition process and a facile hydrothermal approach. Ultrathin layered MnO2 nanosheets are uniformly coated on the surface of the carbon nanotubes (CNTs), directly grown on Ni foam. This unique well-designed binder-free electrode exhibits a high specific capacitance (325.5 F g-1 at a current density of 0.3 A g-1), good rate capability (70.7% retention), and excellent cycling stability (90.5% capacitance retention after 5000 cycles), due to the high conductivity of the close contact between CNTs and Ni foam, as well as the moderate specific surface area of the CNTs@MnO2 core-shell nanostructures. The developed synthetic strategy may provide design guidelines for constructing advanced binder-free supercapacitors electrode. © 2014 Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)760-767
Number of pages8
JournalJournal of Power Sources
Volume269
DOIs
StatePublished - Dec 2014
Externally publishedYes

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