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首页> 外文期刊>Journal of Materials Research >Curvature effects in carbon nanomaterials: Exohedral versus endohedral supercapacitors
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Curvature effects in carbon nanomaterials: Exohedral versus endohedral supercapacitors

机译：碳纳米材料中的曲率效应：外面体与内面体超级电容器

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摘要

Capacitive energy storage mechanisms in nanoporous carbon supercapacitors hinge on endohedral interactions in carbon materials with macro-, meso-, and micropores that have negative surface curvature. In this article, we show that because of the positive curvature found in zero-dimensional carbon onions or one-dimensional carbon nanotube arrays, exohedral interactions cause the normalized capacitance to increase with decreasing particle size or tube diameter, in sharp contrast to the behavior of nanoporous carbon materials. This finding is in good agreement with the trend of recent experimental data. Our analysis suggests that electrical energy storage can be improved by exploiting the highly curved surfaces of carbon nanotube arrays with diameters on the order of 1 nm.
机译：纳米多孔碳超级电容器中的电容储能机制取决于具有负表面曲率的大孔，中孔和微孔在碳材料中的内面相互作用。在本文中，我们表明，由于在零维碳洋葱或一维碳纳米管阵列中发现正曲率，外面相互作用导致归一化电容随粒径或管直径的减小而增加，这与碳纳米管的行为形成鲜明对比。纳米多孔碳材料。这一发现与近期实验数据的趋势非常吻合。我们的分析表明，可以通过利用直径约1 nm的碳纳米管阵列的高度弯曲的表面来改善电能存储。

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  • 来源
    《Journal of Materials Research》 |2010年第8期|P.1525-1531|共7页
  • 作者

    Jingsong Huang; rnBobby G. Sumpter; rnVincent Meunier; rnGleb Yushin; rnCristelle Portet; rnYury Gogotsi;

  • 作者单位

    Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6367;

    rnOak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6367;

    rnOak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6367;

    rnSchool of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245;

    rnDepartment of Materials Science and Engineering, A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104;

    rnDepartment of Materials Science and Engineering, A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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