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首页> 外文期刊>Advanced Functional Materials >Seamless Integration of an Elastomer with Electrode Matrix and its In-Situ Conversion into a Solid State Electrolyte for Robust Li-Ion Batteries
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Seamless Integration of an Elastomer with Electrode Matrix and its In-Situ Conversion into a Solid State Electrolyte for Robust Li-Ion Batteries

机译：弹性体与电极基质的无缝整合及其原位转化为固态电解质的坚固锂离子电池

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摘要

A unique way of robustly integrating an elastomer film onto a graphitic anode and then post-process it into a solid-state electrolyte for lithium-ion battery applications is reported. The mutual solvability of the elastomer and the binder of the graphitic anode (carboxymethyl cellulose, (CMC)) in dimethylfor-mamide facilitates the fusion of the two heterogeneous layers. Dimensional dynamics evolved during the integrated elastomer conversion into a solid electrolyte by liquid electrolyte uptake reveal a notable preferential uniaxial elongation along the normal plane. In contrast, the non-integrated counterpart elongates along the transversal axis. This elastomer exhibits high ionic conductance (≈10-2 S cm~(-1)). Half-cells constructed with our electrolyte integrated electrode exhibit magnificent reduction and oxidation (REDOX) behavior. The efficient charge transfer across the snugly confined semi-solid electrolyte/ electrode interface layer leads to a high rate capability of 0.31 mAh cm~2 (41 mAh g~(-1)) at 2 C which is double that of a graphitic conventional half-cell. Unlike regular graphitic electrodes which degrade over time, this electrode remains robust, thanks to its propensity to retain its inherent elasticity. This work demonstrates a facile and scalable paradigm, in fabrication of flexible electrolytes that can easily be integrated to 3D devices and opens opportunities for developing structurally conformable batteries of varied geometries.
机译：报告了一种独特的方法，可以将弹性体膜牢固地集成到石墨阳极上，然后将其后处理为固态电解质，以用于锂离子电池应用。弹性体和石墨阳极（羧甲基纤维素，（CMC））在二甲基甲酰胺中的互溶性促进了两个异质层的融合。在通过液体电解质吸收而将集成的弹性体转化为固体电解质的过程中所产生的尺寸动力学揭示出沿法向平面的显着优先单轴伸长。相反，非一体的对应物沿横向轴线伸长。该弹性体显示出高的离子电导率（≈10-2S cm〜（-1））。用我们的电解质集成电极构建的半电池具有出色的还原和氧化（REDOX）行为。跨紧密密闭的半固体电解质/电极界面层的有效电荷转移导致在2 C时具有0.31 mAh cm〜2（41 mAh g〜（-1））的高倍率能力，是石墨常规一半的两倍-细胞。与常规石墨电极不同，石墨电极会随着时间的流逝而退化，该电极由于具有保持其固有弹性的倾向而保持坚固。这项工作展示了柔性电解质的制造中的一种可扩展的简便范例，该电解质可以轻松集成到3D设备中，并为开发各种几何形状的结构合适的电池提供了机会。

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  • 来源
    《Advanced Functional Materials》 |2013年第47期|5941-5951|共11页
  • 作者

    Matthew M. Ombaba; Ruxandra Vidu; Logeeswaran Veemyah Jayamman; Mark Triplett; Jonathan Hsu; M. Saif Islam;

  • 作者单位

    Northern California Nanotechnology Center and Electrical and Computer Engineering University of California One shields Avenue, Davis, CA, 95616;

    Department of Chemical Engineering and Material Science University of California Davis, One Shields Avenue, Davis, CA, 95616;

    Northern California Nanotechnology Center and Electrical and Computer Engineering University of California One shields Avenue, Davis, CA, 95616;

    Northern California Nanotechnology Center and Electrical and Computer Engineering University of California One shields Avenue, Davis, CA, 95616;

    Northern California Nanotechnology Center and Electrical and Computer Engineering University of California One shields Avenue, Davis, CA, 95616;

    Northern California Nanotechnology Center and Electrical and Computer Engineering University of California One shields Avenue, Davis, CA, 95616;

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