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A Multiscale Description of the Electronic Transport within the Hierarchical Architecture of a Composite Electrode for Lithium Batteries

机译:锂电池复合电极分层体系内电子传输的多尺度描述

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摘要

The broadband dielectric spectroscopy technique is applied, for the first time, to a composite material used as an electrode for lithium battery. The electrical properties (permittivity and conductivity) are measured from low (a few Hz) to microwave (a few GHz) frequencies. The results demonstrate that the broadband dielectric spectroscopy technique is very sensitive to the different scales of the electrode architecture involved in electronic transport, from interatomic distances to macroscopic sizes, as well as to the morphology at these scales, coarse or fine distribution of the constituents. This work opens up new prospects for a more fundamental understanding and more rational optimization of the electronic transport in composite electrodes for lithium batteries and other electrochemical energy storage technologies (including other batteries, supercapacitors, low- and medium-temperature fuel cells), electrochemical sensors and conductor-insulator composite materials.
机译:宽带介电谱技术首次应用于用作锂电池电极的复合材料。从低频(几赫兹)到微波(几吉赫兹)频率测量电性能(介电常数和电导率)。结果表明,宽带介电谱技术对电子传输中涉及的电极体系结构的不同尺度(从原子间距离到宏观尺寸)以及在这些尺度上的形态,成分的粗略或精细分布非常敏感。这项工作为锂电池和其他电化学储能技术(包括其他电池,超级电容器,低温和中温燃料电池),电化学传感器的复合电极中的电子传输提供了更基本的了解和更合理优化的新前景。和导体-绝缘体复合材料。

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  • 来源
    《Advanced Functional Materials》 |2009年第17期|2749-2758|共10页
  • 作者单位

    Laboratoire de Chimie de la Matiere Condensee de Paris ENSCP, CNRS 11 rue P. et M. Curie, 75231 Paris Cedex 5, (France);

    Institut des Materiaux Jean Rouxel (IMN) Universite de Nantes, CNRS 2, rue de la Houssiniere - B.P. 32229 - 44322 Nantes cedex 3 (France);

    Laboratoire de Genie Electrique de Paris, SUPELEC Univ. Paris 06, University Paris-Sud, CNRS 11 rue Joliot Curie, Plateau de Moulon 91192 Gif-sur-Yvette Cedex (France);

    Institut des Materiaux Jean Rouxel (IMN) Universite de Nantes, CNRS 2, rue de la Houssiniere - B.P. 32229 - 44322 Nantes cedex 3 (France);

    Institut des Materiaux Jean Rouxel (IMN) Universite de Nantes, CNRS 2, rue de la Houssiniere - B.P. 32229 - 44322 Nantes cedex 3 (France);

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