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首页> 外文期刊>Crystal growth & design >Excellent Supercapacitor Performance of Robust Nickel-Organic Framework Materials Achieved by Tunable Porosity, Inner-Cluster Redox, and in Situ Fabrication with Graphene Oxide
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Excellent Supercapacitor Performance of Robust Nickel-Organic Framework Materials Achieved by Tunable Porosity, Inner-Cluster Redox, and in Situ Fabrication with Graphene Oxide

机译：优异的超级电容器性能，通过可调谐孔隙，内簇氧化还原和石墨烯氧化物的原位制造实现的强大的镍有机框架材料的超级电容器性能

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摘要

Metal-organic frameworks have shown promising applications as electrode materials for supercapacitors because of the high porosity and tunable structures, but their poor water stability and conductivity limit their capacitance and efficiency. To demonstrate how to overcome these drawbacks, three isostructural Ni-organic frameworks with [(Ni2NiIII)-Ni-II(mu(3)-OH)(COO)(6)] trinuclear building blocks are selected. Taking advantage of high-connected architectures, absence of open metal sites, and effective inner-cluster redox process, three Ni-organic frameworks all are stable in KOH electrolyte and exhibit a pseudo-capacitor behavior with high specific capacitances up to 394, 426, and 465 F g(-1). The increasing porosity facilitates the diffusion of metal ions and electrons and thus increases their electrochemical performance. Furthermore, we demonstrate that the in situ fabrication of metal-organic frameworks with graphene oxide can effectively promote their supercapacitor performance. With a given 3% graphene oxide doping amount, the pseudo-capacitance values of the three compounds are improved to be 590, 576, and 504 F g(-1) respectively. The values surpass those of most of the reported metal-organic framework supercapacitors up to now. The excellent supercapacitor performance of these Ni-MOFs provides a new route to explore potential electrode material by utilizing robust metal-organic frameworks based on [M-3(mu(3)-OH)(COO)(6)] trinuclear building blocks.
机译：由于高孔隙率和可调谐结构，金属有机框架作为超级电容器的电极材料，但它们的水稳定性差和电导率差限制了它们的电容和效率。为了证明如何克服这些缺点，选择具有[（Ni2NiIII）-NI-II（MU（3）-OH）（COO）（6）]三核构建块的三个同学Ni-有机骨架。利用高连接的架构，缺乏开放式金属网站，有效的内部簇氧化还原过程，三个Ni-有机框架全部在KOH电解质中稳定，具有高达394,426的高比电容的伪电容器行为，和465 f g（-1）。增加的孔隙率有助于金属离子和电子的扩散，从而提高了它们的电化学性能。此外，我们证明了用石墨烯氧化物的金属 - 有机骨架的原位制造可以有效地促进其超级电容器性能。对于给定的3％石墨烯氧化物掺杂量，三种化合物的伪电容值分别改善为590,576和504fg（-1）。这些价值观超越了现在据报道的大多数金属有机框架超级电容器。这些Ni-MOF的优异超级电容器性能提供了通过利用基于[M-3（3）-OH）（COO）（6）]三核构建块的鲁棒金属 - 有机框架来探索潜在电极材料的新途径。

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  • 来源
    《Crystal growth & design》 |2018年第10期|共11页
  • 作者

    Hou Xiang-Yang; Yan Xiao-Li; Wang Xiao; Li Shuni; Jiang Yucheng; Hu Mancheng; Zhai Quan-Guo;

  • 作者单位

    Shaanxi Normal Univ Sch Chem &

    Chem Engn Key Lab Appl Surface &

    Colloid Chem Key Lab Macromol Sci Shaanxi Prov Minist Educ Xian 710062 Shaanxi Peoples R China;

    Shaanxi Normal Univ Sch Chem &

    Chem Engn Key Lab Appl Surface &

    Colloid Chem Key Lab Macromol Sci Shaanxi Prov Minist Educ Xian 710062 Shaanxi Peoples R China;

    Shaanxi Normal Univ Sch Chem &

    Chem Engn Key Lab Appl Surface &

    Colloid Chem Key Lab Macromol Sci Shaanxi Prov Minist Educ Xian 710062 Shaanxi Peoples R China;

    Shaanxi Normal Univ Sch Chem &

    Chem Engn Key Lab Appl Surface &

    Colloid Chem Key Lab Macromol Sci Shaanxi Prov Minist Educ Xian 710062 Shaanxi Peoples R China;

    Shaanxi Normal Univ Sch Chem &

    Chem Engn Key Lab Appl Surface &

    Colloid Chem Key Lab Macromol Sci Shaanxi Prov Minist Educ Xian 710062 Shaanxi Peoples R China;

    Shaanxi Normal Univ Sch Chem &

    Chem Engn Key Lab Appl Surface &

    Colloid Chem Key Lab Macromol Sci Shaanxi Prov Minist Educ Xian 710062 Shaanxi Peoples R China;

    Shaanxi Normal Univ Sch Chem &

    Chem Engn Key Lab Appl Surface &

    Colloid Chem Key Lab Macromol Sci Shaanxi Prov Minist Educ Xian 710062 Shaanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 晶体学;
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