Journal
RSC ADVANCES
Volume 7, Issue 12, Pages 7179-7187Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra25077g
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Funding
- Fundamental Research Funds for the Central Universities
- National Natural Science Foundation of China [51472182, 51272179, U1503292]
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Novel three-dimensional (3D) island-chain structured vanadium pentoxide (V2O5)/graphene (GN)/multiwalled carbon nanotube (MWCNT) hybrid aerogels (VGMA) are synthesized by a sol-gel method. In this process, V2O5 in situ grows along the surface of both MWCNT and GN by the coordination effect. These two kinds of one-dimensional fibers (V2O5 nanofibers and V2O5 coated MWCNT) and one kind of two-dimensional sheets (GN) co-assemble into a 3D porous island-chain structure. VGMA exhibit enhanced specific capacitance (504 F g(-1)), large energy density (70 W h kg(-1)) and outstanding cyclic property (82.9% retention after 32 500 cycles). All these excellent electrochemical properties of ternary VGMA can be attributed to the well-designed nanostructure and synergistic effect of the individual components. This also demonstrates that the unique island-chain nanostructured VGMA can be a good candidate for supercapacitors.
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