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Amorphous silicon - graphene anodes for lithium ion batteries

机译:锂离子电池用非晶硅-石墨烯阳极

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摘要

For the development of the next generation lithium-ion batteries it is primordial to investigate new materials as potential candidates towards the increase of the specific capacity of the anode and the new lighter and efficient cells. In this paper we present our investigation on amorphous silicon(a-Si)deposited by DC-sputtering on top of Single Layer Graphene(SLG)grown by Chemical Vapor Deposition(CVD). Our aim being to improve the mechanical properties of the silicon volume change during charging and discharging cycles, it is found that half cells fabricated with such electrodes can achieve specific capacity values above 2000 mAh/g while avoiding large pulverization phenomena. However, it is also found that the a-Si/SLG interface results in high resistance electrodes and decreases cell performance. We suggest that by improving the a-Si/SLG contact resistance, the performance will further improve.
机译:对于下一代锂离子电池的开发,最重要的是研究新材料作为潜在的候选材料,以增加阳极和新的轻便高效电池的比容量。在本文中,我们介绍了通过化学气相沉积(CVD)在单层石墨烯(SLG)上通过直流溅射沉积非晶硅(a-Si)的研究。我们的目的是改善在充电和放电循环期间硅体积变化的机械性能,发现用这种电极制造的半电池可以达到高于2000 mAh / g的比容量值,同时避免了大的粉化现象。然而,还发现,a-Si / SLG界面导致高电阻电极并降低电池性能。我们建议通过改善a-Si / SLG接触电阻,性能将进一步提高。

著录项

  • 来源
    《》|2013年|87660E.1-87660E.8|共8页
  • 会议地点 Grenoble(FR)
  • 作者单位

    Dept. of Electrical and Computer Engineering, Univ. of Thrace, Kimmeria Campus, Xanthi, GR 67100, Greece;

    Dept. of Electrical Engineering, Columbia Univ., New York, NY 10027 USA;

    Systems Sunlight SA, Neo Olvio, GR 67200 Xanthi, Greece;

    Dept. of Electrical Engineering, Columbia Univ., New York, NY 10027 USA;

    Dept. of Electrical and Computer Engineering, Univ. of Thrace, Kimmeria Campus, Xanthi, GR 67100, Greece;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    graphene; amorphous; silicon; anode; lithium-ion; battery;

    机译:石墨烯无定形硅;阳极;锂离子电池;

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