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首页> 外文会议>Charging amp; infrastructure symposium 2018 >Effects of Morphology and Structure of Sulfur Composite Electrode on the Performance of All-Solid-State Li-S Batteries
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Effects of Morphology and Structure of Sulfur Composite Electrode on the Performance of All-Solid-State Li-S Batteries

机译：硫复合电极的形态和结构对全固态Li-S电池性能的影响

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摘要

All-solid-state Li-S batteries are fabricated with lithium silicide anodes (Li4.4Si), sulfide-based glass electrolyte (Li2S-P2S5), and sulfur composite (sulfur + acetylene black + solid electrolyte) cathode. Various preparation methods, such as mortar mixing (MM), ball milling (BM), and secondary ball milling (SBM), are applied for the sulfur composite cathode. By changing the preparation methods from MM to SBM, the electrode morphology and the electrolyte/cathode interfacial area are significantly improved, as confirmed with BET, SEM/EDS, and GITT analyses. These effects are reflected in the charge-discharge tests, resulting in higher capacity of the SBM cell. Pyrolytic graphite sheet (PGS) is employed for the gradient structure of the sulfur composite cathode, and the cell with PGS shows higher volumetric capacity and equivalent gravimetric capacity than do cells with the conventional cathode structure. This is because the cathode thickness is reduced and the electron transport to/from the current collector is facilitated. Thus, the present work indicates that design and preparation of the electrode greatly affects the performance of solid state batteries with sulfur composite cathodes.
机译：全固态Li-S电池由硅化锂阳极（Li4.4Si），硫化物基玻璃电解质（Li2S-P2S5）和硫复合物（硫+乙炔黑+固体电解质）制成。硫磺复合阴极可采用多种制备方法，例如砂浆混合（MM），球磨（BM）和二次球磨（SBM）。通过将制备方法从MM更改为SBM，可通过BET，SEM / EDS和GITT分析证实，电极形态和电解质/阴极界面面积得到了显着改善。这些效应反映在充放电测试中，从而导致SBM电池的容量更高。热解石墨片（PGS）用于硫复合阴极的梯度结构，具有PGS的电池比具有常规阴极结构的电池具有更高的体积容量和等效重量容量。这是因为减小了阴极厚度并且促进了电子向/从集电器的传输。因此，本工作表明电极的设计和制备极大地影响了具有硫复合阴极的固态电池的性能。

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  • 会议地点 Mainz(DE)
  • 作者

    Hyung-Tae Lim; Han Ul Choi;

  • 作者单位

    Changwon National University, School of Materials Science and Engineering, Changwon, 51140 South Korea;

    Changwon National University, School of Materials Science and Engineering, Changwon, 51140 South Korea;

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