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首页> 外文期刊>Advanced energy materials >A New High Power LiNi0.81Co0.1Al0.09O2 Cathode Material for Lithium-Ion Batteries
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A New High Power LiNi0.81Co0.1Al0.09O2 Cathode Material for Lithium-Ion Batteries

机译：一种用于锂离子电池的新型高功率LiNi0.81Co0.1Al0.09O2正极材料

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摘要

Among the various Ni-based layered oxide systems in the form of LiNi1-y-zCoyAlzO2 (NCA), the compostions between y = 0.1–0.15, z = 0.05 are the most successful and commercialized cathodes used in electric vehicles (EVs) and hybrid electric vehicles (HEVs). However, tremendous research effort has been dedicted to searching for better composition in NCA systems to overcome the limitations of these cathodes, particularly those that arise when they are used use at high discharge/charge rates (>5C) and in high temperature (60 °C) environments. In addition, improving the thermal stability at 4.5 V is also very important in terms of the total amount of heat generated and the onset temperature. Here, a new NCA composition in the form of LiNi0.81Co0.1Al0.09O2 (y = 0.1, z = 0.09) is reported for the first time. Compared to the LiNi0.85Co0.1Al0.05O2 cathode, LiNi0.81Co0.1Al0.09O2 exhibits an excellent rate capability of 155 mAh g−1 at 10 C with a cut-off voltage range between 3 and 4.5 V, corresponding to 562 Wh kg−1 at 24 °C. It additionally provides significantly improved thermal stability and electrochemical performance at the high temperature of 60 °C, with a discharge capacity of 122 mAh g−1 after 200 cycles with capacity retention of 59%.
机译：在以LiNi1-y-zCoyAlzO2（NCA）形式存在的各种镍基层状氧化物体系中，y = 0.1-0.15，z = 0.05之间的堆肥是电动汽车（EV）和混合动力汽车中最成功且商业化的阴极电动汽车（HEV）。但是，为了克服这些阴极的局限性，特别是在高放电/充电率（> 5C）和高温（60°C）下使用时出现的阴极局限性，人们已经进行了大量的研究工作以寻求更好的成分。 C）环境。此外，就产生的热量总量和起始温度而言，提高4.5 V时的热稳定性也非常重要。在此，首次报道了以LiNi0.81Co0.1Al0.09O2（y = 0.1，z = 0.09）的形式出现的新的NCA成分。与LiNi0.85Co0.1Al0.05O2阴极相比，LiNi0.81Co0.1Al0.09O2在10 C时具有155 mAh g-1的出色倍率能力，截止电压范围为3至4.5 V，相当于562 Wh在24°C下为kg-1。此外，它在60°C的高温下具有显着改善的热稳定性和电化学性能，在200次循环后的放电容量为122 mAh g-1，容量保持率为59％。

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  • 来源
    《Advanced energy materials》 |2014年第13期|1-8|共8页
  • 作者

    Minki Jo; Mijung Noh; Pilgun Oh; Youngsik Kim; Jaephil Cho;

  • 作者单位

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

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

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

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

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

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  • 正文语种 eng
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  • 关键词

    LiNi0.81Co0.1Al0.09O2; cathode materials; Li-ion batteries; rate capability; thermal stability;

    机译：LiNi0.81Co0.1Al0.09O2;阴极材料;锂离子电池;倍率能力;热稳定性;

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