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High supercapacitive performance of Ni(OH)(2)/XC-72 composite prepared by microwave-assisted method

机译:微波辅助制备的Ni(OH)(2)/ XC-72复合材料的超强电容性能

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摘要

A 60 wt% Ni(OH)(2)/XC-72 composite was synthesized via a facile and rapid microwave-assisted method in an ethylene glycol medium. Transmission electron microscopy images show that Ni(OH) 2 is uniformly dispersed on XC-72 and that when carbon nanotubes (CNTs) are added as a conductive agent, they construct a three-dimensional (3-D) network together with the Ni(OH)(2) particles and XC-72. The composite demonstrates a specific capacitance of 1296 F g(-1) at a scan rate of 2 mV s(-1) and 1560 F g(-1) at a current density of 1 A g(-1) in 6 M KOH aqueous solution, and its retention of specific capacitance is 71% after 1000 cycles. This can be attributed to XC-72 being an excellent support and CNTs with high aspect ratio and good conductivity to construct a 3-D conductive network. This excellent electrochemical performance makes the Ni(OH) 2/XC-72 composite promising as an electrode material for a supercapacitor.
机译:通过简便,快速的微波辅助方法,在乙二醇介质中合成了60 wt%Ni(OH)(2)/ XC-72复合材料。透射电子显微镜图像显示Ni(OH)2均匀分散在XC-72上,并且当添加碳纳米管(CNT)作为导电剂时,它们与Ni(OH)一起构成三维(3-D)网络OH)(2)颗粒和XC-72。该复合材料在6 M KOH中的电流密度为1 A g(-1)时,在2 mV s(-1)的扫描速率下显示出1296 F g(-1)的比电容,在1 A g(-1)的电流密度下显示为1560 F g(-1)水溶液,在1000次循环后其比电容保留率为71%。这可以归因于XC-72是一种出色的载体,CNT具有高纵横比和良好的导电性,可以构建3-D导电网络。这种出色的电化学性能使Ni(OH)2 / XC-72复合材料有望用作超级电容器的电极材料。

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