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The effect of loading density of nickel-cobalt sulfide arrays on their cyclic stability and rate performance for supercapacitors

镍钴硫阵列电极的负载密度对超级电容器倍率性能及循环稳定性的影响

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Abstract

Nickel-cobalt sulfide arrays with different loading densities were fixed on nickel foam via a facile hydrothermal method in ethanol. Their loading densities could be easily adjusted via changing the amount of reactants. It was found that the nickel-cobalt sulfide arrays on Ni foam with moderate loading density showed excellent electrochemical performance for supercapacitors. The best sample not only exhibited an outstanding areal capacitance of 4.84 F cm−2 at 10 mA cm−2 but also showed the best cycle stability and rate performance compared with the samples with other loading densities. Remarkably, this method to control the loading densities of nickel-cobalt sulfide on nickel foammay provide a new strategy for the investigation of other nanoarrays on various substrates for catalysts and lithium-ion batteries other than supercapacitors.

摘要

本文以无水乙醇为溶剂通过水热反应在泡沫镍上生长了不同负载密度的镍钴硫阵列. 它们的负载密度可以通过简单方法来调节. 而 且, 通过实验发现, 在泡沫镍上生长负载密度适中的镍钴硫阵列时, 能获得优异的超电容电化学性能. 本实验中, 性能最好的实验组不仅在 10 mA cm−2时表现出了4.84 F cm−2的杰出面电容, 同时也表现出了比其他负载密度实验组更加优异的循环稳定性以及倍率性能. 值得注意 的是, 这种控制镍钴硫阵列负载密度的实验方案, 还能够为除了超电容以外的催化及锂电池研究提供一种将其他纳米阵列长在各种衬基 上的新策略.

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Authors and Affiliations

  1. Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China

    Renzhe Wang  (王任哲), Yazi Luo  (罗雅孜), Zhi Chen  (陈智), Ming Zhang  (张明) & Taihong Wang  (王太宏)

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  1. Renzhe Wang  (王任哲)
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  2. Yazi Luo  (罗雅孜)
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  3. Zhi Chen  (陈智)
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  4. Ming Zhang  (张明)
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  5. Taihong Wang  (王太宏)
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Corresponding authors

Correspondence to Ming Zhang  (张明) or Taihong Wang  (王太宏).

Additional information

Renzhe Wang is a graduate student at the School of Physics and Electronics, Hunan University. His current research is focused on the nanoscience and nanodevice for energy storage and conversion.

Ming Zhang is an assistant professor in Hunan University since 2012. His research is focused on the design and synthesis of nanocomposites for supercapacitors, lithium ion batteries, and gas sensors. He has publishedmore than 50 papers which have been cited more than 2200 times.

Taihong Wang is a Cheung Kong Professor in Hunan University since 2005. His research interests include ultrasensors, lithium ion batteries, and nanodevices. He has published more than 200 papers, and more than 80 papers were published in the noted Journal of Applied Physics Letters in the field of applied physics. More than 50 items of his patents have been authorized.

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40843_2016_5074_MOESM1_ESM.pdf

The effect of the loading density of nickel-cobalt sulfide arrays on their cyclic stability and rate performance for supercapacitors

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Wang, R., Luo, Y., Chen, Z. et al. The effect of loading density of nickel-cobalt sulfide arrays on their cyclic stability and rate performance for supercapacitors. Sci. China Mater. 59, 629–638 (2016). https://doi.org/10.1007/s40843-016-5074-y

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  • DOI: https://doi.org/10.1007/s40843-016-5074-y

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