Aqueous-Based Chemical Route toward Ambient Preparation of Multicomponent Core-Shell Nanotubes

作者：Tan Hui Teng; Rui Xianhong; Yu Hong; Liu Weiling; Xu Chen; Xu Zhichuan; Hng Huey Hoon; Yan Qingyu^*

来源：ACS Nano, 2014, 8(4): 4004-4014.

DOI：10.1021/nn500942k

• multicomponents
• core-shell architecture
• nanotubes
• supercapacitor electrode
• synergistic effect

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.

• 出版日期2014-4
• 单位南阳理工学院