Abstract
Cu@MOF core-shell nanowires are synthesized by introducing oxidizable and CTAB-modified metal nanowires as self-engaged templates and supporting MOFs for a one-dimension nanostructure.The following thermal process is controlled to obtain several one-dimension structures of CuCo-mixed materials,such as nanorods,single-shell and double-shell nanowires.The hollow structure for electrode materials enlarges the surface area,provides buffer space for electrolyte to accelerate the ion/charge transfers and for the structure to reduce injuries of volume expansion during cycling.Together with some other merits,such as adequate oxidation of the MOFs,small crystal grains of the material,and well-mixed Cu/Co oxides,the double-shell Cu@MOF nanowires (CuCo-DSS) applied for pseudocapacitors deliver advanced electrochemical performance with a specificcapacitanceof563.8 Fg-1 at1Ag-1 as well as an outstanding cycling stability with a 92 ％ retention after 3000 cycles at 5 A g-1.Meanwhile,an asymmetric pseudocapacitor constructed with the CuCo-DS5 and active carbon (AC) shows a high specific capacitance and energy density.
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维普
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