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首页> 外文期刊>Journal of power sources >Effect of reductive cyclic carbonate additives and linear carbonate co- solvents on fast chargeability of LiNi_(0.6)Co_(0.2)Mn_(0.2)O_2/graphite cells
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Effect of reductive cyclic carbonate additives and linear carbonate co- solvents on fast chargeability of LiNi_(0.6)Co_(0.2)Mn_(0.2)O_2/graphite cells

机译：还原性环状碳酸酯添加剂和线性碳酸酯共溶剂对LiNi_（0.6）Co_（0.2）Mn_（0.2）O_2 /石墨电池快速充电性能的影响

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摘要

For application to electric vehicles, the fast charging of lithium-ion batteries is required. However, lithium-ion batteries are faced with undesirable Li plating causing the capacity fading with low Coulombic efficiency at high charge rates. Here, we present the effects of solid electrolyte interphase structures of the graphite anode and linear carbonate solvents on fast charging capability of LiNi0.6Co0.2Mn0.2O2/graphite full cells. To control the nature of the interfacial layer on the graphite anode affecting the Li plating behavior, we exploit three kinds of additives, ethylene carbonate, fluoroethylene carbonate and vinylene carbonate, as anode solid electrolyte interphase formers. In addition, the effect of ethyl methyl carbonate and dimethyl carbonate on the solvation and transport of high concentrations of Li ions de-intercalated from the LiNi0.6Co0.2Mn0.2O2cathode in a full cell at high charge rates is explored in fluoroethylene carbonate-based electrolytes. Our investigation reveals that the combination of fluoroethylene carbonate and dimethyl carbonate in the electrolyte enables fast-charging LiNi0.6Co0.2Mn0.2O2/graphite full cells showing the excellent capacity retention of 79% after 1000 cycles at a high charging current density of 6 mA cm−2, corresponding to 2C, and a discharge rate of 1C without Li plating on the graphite anode.
机译：为了应用于电动车辆，需要对锂离子电池快速充电。然而，锂离子电池面临不期望的锂镀覆，导致在高充电率下低库仑效率的容量衰减。在这里，我们介绍了石墨阳极和线性碳酸酯溶剂的固体电解质相间结构对LiNi0.6Co0.2Mn0.2O2 /石墨充满电池快速充电能力的影响。为了控制石墨阳极上界面层的性质影响Li电镀行为，我们开发了三种添加剂，即碳酸亚乙酯，碳酸氟亚乙酯和碳酸亚乙烯酯作为阳极固体电解质的中间相。此外，在碳酸氟乙烯酯基电池中，研究了碳酸乙基甲基酯和碳酸二甲酯对充满锂的LiNi0.6Co0.2Mn0.2O2阴极脱嵌的高浓度Li离子在全电池中的溶解和迁移的影响。电解质。我们的研究表明，电解质中的氟代碳酸亚乙酯和碳酸二甲酯的组合可实现快速充电的LiNi0.6Co0.2Mn0.2O2 /石墨充满电池，在6 mA的高充电电流密度下，经过1000次循环后，仍具有79％的出色容量保持率cm-2（对应于2C）和1C的放电速率（在石墨阳极上未镀Li）。

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  • 来源
    《Journal of power sources》 |2018年第1期|147-156|共10页
  • 作者

    Hye Bin Son; Min-Young Jeong; Jung-Gu Han; Koeun Kim; Kyung Ho Kim; Kyeong-Min Jeong; Nam-Soon Choi;

  • 作者单位

    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST);

    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST);

    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST);

    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST);

    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST);

    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST);

    School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST);

  • 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

    Lithium-ion batteries; Fast charging; Lithium plating; Solid electrolyte interphase; Solvation;

    机译：锂离子电池;快速充电;锂电镀;固体电解质相间;溶剂化;

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