Journal
ACS NANO
Volume 8, Issue 4, Pages 4004-4014Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn500942k
Keywords
multicomponents; core-shell architecture; nanotubes; supercapacitor electrode; synergistic effect
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Funding
- Singapore MOE AcRF Tier 1 [RG2/13]
- A*STAR SERC [1021700144]
- Singapore MPA [23/04.15.03]
- Singapore National Research Foundation
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Room-temperature synthesized V2O5@MnO2 core-shell nanotubes with tunable tunnel dimensions via a facile aqueous-based method are presented. The rational-designed tubular morphology endows them with good permeability of electrolyte ions for maximum utilization of the electroactive sites, while the epitaxial-grown MnO2 imposes mechanical support to V2O5, against structural collapse upon long-term cycling. Hence, specific capacitance as high as 694 F g(-1) is achieved at 1 A g(-1) accompanied by excellent cycling stability (preserved 92% of its initial specific capacitance after 5000 cycles). In addition, functionalization of the V2O5@MnO2 nanotubes with other transition metal oxides results in ternary composites, V2O5@MnO2/M nanotubes (M = Fe2O3, Co2O3/Co(OH)(2), Ni(OH)(2)). The versatility of this synthetic protocol provides a platform to fabricate complex ternary nanocomposites in a more benign way.
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