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Issue 30, 2015
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Controlled synthesis of V2O5/MWCNT core/shell hybrid aerogels through a mixed growth and self-assembly methodology for supercapacitors with high capacitance and ultralong cycle life

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Abstract

Vanadium pentoxide (V2O5)/multiwalled carbon nanotube (MWCNT) core/shell hybrid aerogels with different MWCNT contents are controlled synthesized through a facile mixed growth and self-assembly methodology. V2O5 coated MWCNTs from the in situ growth of V2O5 on the surface of acid-treated MWCNTs incorporate with V2O5 nanofibers from the preferred orientation growth of V2O5 in a one-step sol–gel process. These two kinds of one-dimensional fibers self-assemble into a three-dimensional monolithic porous hybrid aerogel. Owing to its high specific surface area, favorable electrical conductivity and unique three-dimensional and core/shell structures, the light weight hybrid aerogel (about 30 mg cm−3) exhibits excellent specific capacitance (625 F g−1), high energy density (86.8 W h kg−1) and outstanding cycle performance (>20 000 cycles). And the optimal content of MWCNTs in hybrid aerogels for the highest-performance supercapacitor is 7.6%.

Graphical abstract: Controlled synthesis of V2O5/MWCNT core/shell hybrid aerogels through a mixed growth and self-assembly methodology for supercapacitors with high capacitance and ultralong cycle life

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Publication details

The article was received on 14 Apr 2015, accepted on 18 Jun 2015 and first published on 18 Jun 2015


Article type: Paper
DOI: 10.1039/C5TA02708J
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Citation: J. Mater. Chem. A, 2015,3, 15692-15699

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    Controlled synthesis of V2O5/MWCNT core/shell hybrid aerogels through a mixed growth and self-assembly methodology for supercapacitors with high capacitance and ultralong cycle life

    Y. Wu, G. Gao, H. Yang, W. Bi, X. Liang, Y. Zhang, G. Zhang and G. Wu, J. Mater. Chem. A, 2015, 3, 15692
    DOI: 10.1039/C5TA02708J

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