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首页> 外文期刊>RSC Advances >Construction of CuCo2O4@CuCo2O4 hierarchical nanowire arrays grown on Ni foam for high-performance supercapacitors
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Construction of CuCo2O4@CuCo2O4 hierarchical nanowire arrays grown on Ni foam for high-performance supercapacitors

机译：在Ni泡沫上生长的高性能CuCo 2 O 4 @CuCo 2 O 4 纳米线阵列的构建超级电容器

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In this study, hierarchical CuCo2O4@CuCo2O4 nanowire arrays have been directly fabricated on Ni foam via a two-step method that involves hydrothermal and calcination processes. The CuCo2O4 nanowires are fully covered by porous CuCo2O4 nanosheets. The as-prepared double-metal oxide hierarchical nanowire arrays exhibit superior redox reactivity for supercapacitors. The unique hierarchical nanowire arrays own a specific capacitance of up to 888.9 F g?1 at 2 mA cm?2, which is much higher than the specific capacitance values of simple CuCo2O4 nanowire arrays. The hierarchical CuCo2O4 nanostructure shows superior cycling stability, retaining 101.77% of the initial capacitance after 2000 cycles. Moreover, by employing CuCo2O4@CuCo2O4 as the positive electrode and active carbon (AC) as the negative electrode, an asymmetric supercapacitor (ASC) device was fabricated and it displayed an excellent electrochemical performance. The enhanced electrochemical performance is mainly due to its unique hierarchical structure, which provides good ion and electron transfer, a large number of active sites, and the synergistic effect. In view of their outstanding electrochemical performance and the cost-effective fabrication process, this unique integrated nanoarchitecture may offer great promise as superior electrodes for high-performance supercapacitors.
机译：在这项研究中，分层CuCo 2 O 4 @CuCo 2 O 4 纳米线阵列是通过涉及水热和煅烧过程的两步方法直接在泡沫镍上制备的。 CuCo 2 O 4 纳米线被多孔CuCo 2 完全覆盖> O 4 纳米片。所制备的双金属氧化物分级纳米线阵列对超级电容器表现出优异的氧化还原反应性。独特的分层纳米线阵列在2 mA cm ？2 ？1 的比电容>，比简单的CuCo 2 O 4 纳米线阵列的比电容值高得多。分层的CuCo 2 O 4 纳米结构显示出优异的循环稳定性，在2000次循环后保留了初始电容的101.77％ 。此外，通过使用CuCo 2 O 4 @CuCo 2 < / small> O 4 作为正电极，活性炭（AC）作为负电极，制造了一种不对称超级电容器（ASC）器件，它具有出色的电化学性能。增强的电化学性能主要归因于其独特的层次结构，该结构提供了良好的离子和电子转移，大量的活性位点以及协同效应。鉴于其出色的电化学性能和具有成本效益的制造工艺，这种独特的集成纳米架构可以作为高性能超级电容器的优质电极，具有广阔的前景。

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