Three-dimensional networked NiCo2O4/MnO2 branched nanowire heterostructure arrays on nickel foam with enhanced supercapacitor performance
Three-dimensional networked NiCo2O4/MnO2 branched nanowire heterostructure arrays on nickel foam with enhanced supercapacitor performance
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DOI：
10.1039/c4ta05059b
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发表时间：
2015
影响因子：
--
通讯作者：
Rujia Zou;M. Yuen;Zhenyu Zhang;Junqing Hu;Wenjun Zhang
中科院分区：
文献类型：
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作者：
Rujia Zou;M. Yuen;Zhenyu Zhang;Junqing Hu;Wenjun Zhang
网状分支纳米线异质结构（BNH）杂化材料对于超级电容器电极是非常有前途的，与包含单一组分或核/壳纳米线异质结构的电极相比，其提供增强的电化学性能。本文采用一步水热反应后退火处理的方法，在泡沫镍基底上合成了网络状NiCo 2 O 4/MnO 2 BNH阵列，并将其作为超级电容器的电极材料。所制备的电极在高充/放电电流密度下表现出优异的比电容、优异的倍率性能和优异的循环稳定性。这种出色的整体电化学性能归因于组分材料之间的有效导电传输路径、减少的电子和离子传输路径、增强的表面积以及电解质容易渗透到3D网络化BNH中。网络化的BNH设计可能为开发用于高性能赝电容器的新电极材料提供通用方法。
Networked branched nanowire heterostructure (BNH) hybrid materials are very promising for supercapacitor electrodes, providing enhanced electrochemical performance compared with electrodes comprising a single constituent or core/shell nanowire heterostructures. Herein, by using a one-step hydrothermal reaction followed by a post-annealing treatment, we synthesized networked NiCo2O4/MnO2 BNH arrays on Ni foam substrates and applied them as electrodes in supercapacitors. The as-prepared electrodes exhibit ultrahigh specific capacitance, excellent rate capability, and superb cycling stability at a high charge/discharge current density. This outstanding overall electrochemical performance is attributed to the effective conductive transport path between component materials, reduced electron- and ion-transport pathways, enhanced surface area, and facile electrolyte infiltration into the 3D networked BNH. The networked BNH design may provide a universal approach for the development of new electrode materials for high-performance pseudocapacitors.