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首页> 外文期刊>Journal of power sources >Electrodeposited three-dimensional porous Si-O-C/Ni thick film as high performance anode for lithium-ion batteries
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Electrodeposited three-dimensional porous Si-O-C/Ni thick film as high performance anode for lithium-ion batteries

机译:电沉积三维多孔Si-O-C / Ni厚膜作为锂离子电池的高性能阳极

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摘要

A novel 3D porous Si-O-C/Ni thick film anode is successfully prepared by electrodeposition of porous Ni on Cu substrate and galvanostatical electrodeposition of Si-O-C composite on porous Ni substrate. The 3D porous Si-O-C/Ni thick film is electrochemically activated at a current density of 50 μA cm~(-2) for the first cycle and 200 μA cm~(-2) (0.5 C) for the subsequent cycles, it displays superior electrochemical performance with discharge capacity of 706.3 mAh g~(-1) of Si after 100 cycles. The properties of this thick film is analyzed by field emission scanning electron microscopy (FESEM) and scanning transmission electron microscopy with energy dispersive X-ray analyzer (STEM-EDX). The results show that Si-O-C composite not only covers the surface area of porous Ni but also attaches to the highly porous dendritic walls, along with the porous structure of Ni which provides proper accommodation for the volume change of silicon during the lithiation/delithiation processes, are believed to result in the high capacity and excellent cyclability.
机译:通过在铜基体上电沉积多孔镍,在镍基多孔体上电沉积Si-O-C复合材料,成功地制备了新型3D多孔Si-O-C / Ni厚膜阳极。它显示3D多孔Si-OC / Ni厚膜在第一个循环中以50μAcm〜(-2)的电流密度被电化学激活,在随后的循环中以200μAcm〜(-2)(0.5 C)的电流密度被激活。优异的电化学性能,100次循环后的放电容量为706.3 mAh g〜(-1)的Si。通过场发射扫描电子显微镜(FESEM)和能量分散X射线分析仪(STEM-EDX)的扫描透射电子显微镜分析该厚膜的性能。结果表明,Si-OC复合材料不仅覆盖了多孔Ni的表面积,而且附着在高度多孔的枝晶壁上,并且Ni的多孔结构为锂化/脱锂过程中硅的体积变化提供了适当的适应性。据信具有高容量和优异的循环性。

著录项

  • 来源
    《Journal of power sources》 |2014年第25期|794-799|共6页
  • 作者单位

    State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, China;

    State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, China;

    Research Institute for Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;

    Research Institute for Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;

    State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, China;

    Research Institute for Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;

  • 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
  • 中图分类
  • 关键词

    Si-O-C/Ni thick film; 3D porous anode; Electrodeposition; Organic electrolyte; Lithium-ion battery;

    机译:Si-O-C / Ni厚膜;3D多孔阳极;电沉积;有机电解质;锂离子电池;

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