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The role of thermal annealing on the microstructures of (Ti, Fe)-alloyed Si thin-film anodes for high-performance Li-ion batteries

机译:热退火对高性能锂离子电池(Ti,Fe)的微观结构的作用,用于高性能锂离子电池的基于Si薄膜阳极

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摘要

Here, we studied the effect of thermal annealing on the microstructure and cyclic stability of a (Ti, Fe)-alloyed Si thin-film fabricated by a simple sputtering deposition method for Li-ion battery (LIB) anodes. The anode samples annealed at different temperatures (300-600 degrees C) were subjected to microstructure analysis and LIB performance test. The (Ti, Fe)-alloyed Si thin-film anode delivered a high capacity of 1563 mA h g(-1) for 100 cycles at 0.1 A g(-1) with neatly 100% capacity retention. Post-mortem analysis using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) disclosed the microstructural changes of the cycled anodes, revealing that (Ti, Fe) silicides served as a structural buffer against the large volume change of active Si during cycling for enhanced LIB performance.
机译:在此,我们研究了热退火对通过简单的溅射沉积方法制造的(Ti,Fe)的微观结构和循环稳定性的效果,其通过简单的溅射沉积法为Li离子电池(Lib)阳极制造。 对不同温度(300-600℃)退火的阳极样品进行微观结构分析和Lib性能测试。 - (Ti,Fe) - 合金化Si薄膜阳极在0.1Ag(-1)下以101Ag(-1)的高容量为100次循环,整齐100%容量保持。 使用现场发射扫描电子显微镜(FeSEM)和透射电子显微镜(TEM)的验证分析公开了循环阳极的微观结构变化,揭示(Ti,Fe)硅化物作为结构缓冲器,其抵抗活性Si的大容量变化 在循环期间提高lib性能。

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  • 来源
    《RSC Advances》 |2018年第17期|共7页
  • 作者单位

    Sungkyunkwan Univ Sch Adv Mat Sci &

    Engn Suwon South Korea;

    Sungkyunkwan Univ Sch Adv Mat Sci &

    Engn Suwon South Korea;

    Sungkyunkwan Univ Sch Adv Mat Sci &

    Engn Suwon South Korea;

    KIMM Nanoconvergence Mech Syst Res Div Daejeon South Korea;

    Sungkyunkwan Univ Sch Adv Mat Sci &

    Engn Suwon South Korea;

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

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