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首页> 外文期刊>Advanced energy materials >Vanadium Oxide Nanowire–Carbon Nanotube Binder-Free Flexible Electrodes for Supercapacitors
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Vanadium Oxide Nanowire–Carbon Nanotube Binder-Free Flexible Electrodes for Supercapacitors

机译：氧化钒纳米线–超级电容器用碳纳米管无粘结剂柔性电极

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摘要

Vanadium pentoxide (V2O5) layered nanostructures are known to have very stable crystal structures and high faradaic activity. The low electronic conductivity of V2O5 greatly limits the application of vanadium oxide as electrode materials and requires combining with conducting materials using binders. It is well known that the organic binders can degrade the overall performance of electrode materials and need carefully controlled compositions. In this study, we develop a simple method for preparing freestanding carbon nanotube (CNT)-V2O5 nanowire (VNW) composite paper electrodes without using binders. Coin cell type (CR2032) supercapacitors are assembled using the nanocomposite paper electrode as the anode and high surface area carbon fiber electrode (Spectracarb 2225) as the cathode. The supercapacitor with CNT-VNW composite paper electrode exhibits a power density of 5.26 kW Kg−1 and an energy density of 46.3 Wh Kg−1. (Li)VNWs and CNT composite paper electrodes can be fabricated in similar manner and show improved overall performance with a power density of 8.32 kW Kg−1 and an energy density of 65.9 Wh Kg−1. The power and energy density values suggest that such flexible hybrid nanocomposite paper electrodes may be useful for high performance electrochemical supercapacitors.
机译：已知五氧化二钒（V2O5）层状纳米结构具有非常稳定的晶体结构和高法拉第活性。 V2O5的低电子电导率极大地限制了氧化钒作为电极材料的应用，并且需要与使用粘合剂的导电材料结合使用。众所周知，有机粘合剂会降低电极材料的整体性能，并且需要仔细控制组成。在这项研究中，我们开发了一种无需使用粘合剂即可制备独立式碳纳米管（CNT）-V2O5纳米线（VNW）复合纸电极的简单方法。使用纳米复合纸电极作为阳极，高表面积碳纤维电极（Spectracarb 2225）作为阴极，组装纽扣电池型（CR2032）超级电容器。具有CNT-VNW复合纸电极的超级电容器的功率密度为5.26 kW Kg-1，能量密度为46.3 Wh Kg-1。 （Li）VNWs和CNT复合纸电极可以类似的方式制造，并显示出更高的整体性能，功率密度为8.32 kW Kg-1，能量密度为65.9 Wh Kg-1。功率和能量密度值表明，这种柔性混合纳米复合纸电极可用于高性能电化学超级电容器。

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  • 来源
    《Advanced energy materials》 |2011年第5期|1-10|共10页
  • 作者

    Sanjaya D. Perera; Bijal Patel; Nour Nijem; Katy Roodenko; Oliver Seitz; John P. Ferraris; Yves J. Chabal; Kenneth J. Balkus Jr.;

  • 作者单位

    Department of Chemistry and the Alan G. MacDiarmid Nanotech Institute 800 West Campbell Rd University of Texas at Dallas Richardson TX 75080 USA;

    Department of Chemistry and the Alan G. MacDiarmid Nanotech Institute 800 West Campbell Rd University of Texas at Dallas Richardson TX 75080 USA;

    Laboratory for Surface and Nanostructure Modification Department of Material Science and Engineering 800 West Campbell Rd University of Texas Dallas Richardson TX 75080 USA;

    Laboratory for Surface and Nanostructure Modification Department of Material Science and Engineering 800 West Campbell Rd University of Texas Dallas Richardson TX 75080 USA;

    Department of Chemistry and the Alan G. MacDiarmid Nanotech Institute 800 West Campbell Rd University of Texas at Dallas Richardson TX 75080 USA;

    Department of Chemistry and the Alan G. MacDiarmid Nanotech Institute 800 West Campbell Rd University of Texas at Dallas Richardson TX 75080 USA;

    Laboratory for Surface and Nanostructure Modification Department of Material Science and Engineering 800 West Campbell Rd University of Texas Dallas Richardson TX 75080 USA;

    Department of Chemistry and the Alan G. MacDiarmid Nanotech Institute 800 West Campbell Rd University of Texas at Dallas Richardson TX 75080 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    carbon nanotubes; composite paper electrodes; flexible electrodes; supercapacitors; vanadium oxide nanowires;

    机译：碳纳米管;复合纸电极;柔性电极;超级电容器;氧化钒纳米线;

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