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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Hierarchical electrodes assembled by alternate NiCo hydroxide nanowires arrays and conductive interlayers with enhanced properties for electrochemical supercapacitors
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Hierarchical electrodes assembled by alternate NiCo hydroxide nanowires arrays and conductive interlayers with enhanced properties for electrochemical supercapacitors

机译：由替代Nico氢氧化物纳米线阵列组装的分层电极和导电夹层具有增强的电化学超级电容器的性能

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摘要

Transition metal oxides/hydroxides materials attract much attention in the field of energy storage materials because of their high theoretical specific capacity and low cost. However, it is normally difficult to improve the capacitance of the electrode by simply increasing the mass loading or thickness of the electrode. To raise the utilizing efficiency of the active material, hierarchical integrated electrodes assembled by NiCo hydroxide nanowires arrays and reduced graphene oxide interlayers are well designed and synthesized. The surface morphology and inner structure of the hierarchical electrode are characterized by SEM. The electrochemical performances of the electrodes are evaluated by threeelectrode and two-electrode system in 2 M KOH respectively. Assisted with two reduced graphene oxide interlayers, NiCo hydroxide nanowires arrays exhibit a specific capacity of 2.41 C cm(-2) at 1 mA cm(-2). Even at a high current density of 50 mA cm(-2), nearly 47% of the capacity could still remain. The results show that, the multi-level nanowires arrays structure provides multi-dimensional transmission path for ions and electrons, and achieved higher specific capacities and rate properties. (C) 2019 Elsevier B.V. All rights reserved.
机译：过渡金属氧化物/氢氧化物材料由于其高理论特异性容量和低成本而在储能材料领域吸引了很多关注。然而，通常难以简单地增加电极的质量加载或厚度来改善电极的电容。为了提高活性材料的利用效率，由Nico氢氧化物纳米线阵列组装的分层集成电极和还原的石墨烯膜中间夹层精心设计和合成。层次电极的表面形态和内部结构的特征在于SEM。电化学的电化学性能分别在2M KOH中的三电极和双电极系统评估。辅助两种还原的石墨烯氧化物中间层，Nico氢氧化物纳米线阵列在1mA cm（-2）下表现出2.41ccm（-2）的比容量。即使在50 mA cm（-2）的高电流密度下，近47％的容量仍然可以留下。结果表明，多级纳米线阵列结构为离子和电子提供多维传输路径，并实现了更高的特定容量和速率性能。 （c）2019 Elsevier B.v.保留所有权利。

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