Facile fabrication of flower-like CuCo2S4 on Ni foam for supercapacitor application

Facile fabrication of flower-like CuCo2S4 on Ni foam for supercapacitor application
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在泡沫镍上轻松制备花状 CuCo2S4 用于超级电容器

DOI:
10.1007/s10853-017-1119-1
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发表时间:
2017-04
影响因子:
4.5
通讯作者:
Zhongxia Liu
Zhongxia Liu
中科院分区:
材料科学3区
文献类型:
--
作者:
Yan Zhang;Jie Xu;Yingjiu Zhang;Yayun Zheng;Xing Hu;Zhongxia Liu

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摘要 电化学性能和生产成本是超级电容器实用化电极材料的主要关注点。在这里,我们采用一种简单且普遍适用的两步水热处理工艺,直接在泡沫镍上生长出花状CuCo2S4纳米片阵列,并将其用作无粘结剂和无导电剂的伪电容器电极。在电流密度为5 mA/cm−2时,电极的超大容量为908.9 fF/g−1;在30 mA/cm−2时,电极具有优异的循环稳定性,与初始容量相比,2 000次循环后仍保持91.1%的循环稳定性。此外,组装的花状纳米结构CuCo2S4//活性碳不对称超级电容器在1 mA/cm−2时的比容为93.5F/g−1,在127W/kg−1时的能量密度为29.2wh/kg−1,在25 mA/cm−2的大电流密度下经2000次循环的容量保持率为126.39,这表明花状CuCo2S4纳米片阵列具有高性能超级电容器的实际应用前景。
Abstract Electrochemical performance and production cost are the main concerns of electrode materials for the practical supercapacitor applications. Here we use a simple and universally applicable two-step hydrothermal treatment process to prepare the flower-like CuCo2S4 nanosheet arrays directly grown on Ni foam and employ it as binder-free and conductive-agent-free electrode for pseudocapacitors. The electrode at a current density of 5 mA cm−2 exhibits an ultrahigh capacitance of 908.9 F g−1 and at 30 mA cm−2 delivers an outstanding cycling stability with retaining 91.1% after 2000 cycles compared with its initial capacity. Furthermore, the assembled flower-like nanostructured CuCo2S4//active carbon asymmetric supercapacitor displays a specific capacitance of 93.5 F g−1 at 1 mA cm−2, an energy density of 29.2 Wh kg−1 at 127 W kg−1, as well as 126.39% capacitance retention through 2000 cycles at the high current density of 25 mA cm−2, suggesting the flower-like CuCo2S4 nanosheet arrays hold promise for practical application of high-performance supercapacitors.
DOI: 10.1039/c6ra10327h
发表时间: 2016-06
期刊: RSC Advances
影响因子: 3.9
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期刊: Journal of Materials Science: Materials in Electronics
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影响因子: 6.6
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