Construction of multi-structures based on Cu NWs-supported MOF-derived Co oxides for asymmetric pseudocapacitors
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第6期
论文作者：Ruimei Yuan Hejun Li Xuemin Yin Peipei Wang Jinhua Lu Leilei Zhang
文章页码：182 - 189
摘 要：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 structure s ofCuCo-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-DS5） applied for pseudocapacitors deliver advanced electrochemical performance with a specific capacitance of 563.8 F g-1 at 1 A g-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.
Ruimei Yuan，Hejun Li，Xuemin Yin，Peipei Wang，Jinhua Lu，Leilei Zhang
State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University
摘 要：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 structure s ofCuCo-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-DS5） applied for pseudocapacitors deliver advanced electrochemical performance with a specific capacitance of 563.8 F g-1 at 1 A g-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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