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首页> 外文期刊>RSC Advances >Al2O3-coated Li1.2Mn0.54Ni0.13Co0.13O2 nanotubes as cathode materials for high-performance lithium-ion batteries
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Al2O3-coated Li1.2Mn0.54Ni0.13Co0.13O2 nanotubes as cathode materials for high-performance lithium-ion batteries

机译：Al2O3涂覆的Li1.2mn0.54Ni0.13Co0.13O2纳米管作为高性能锂离子电池的阴极材料

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摘要

Li-rich manganese-based layered cathode Li1.2Mn0.54Ni0.13Co0.13O2 (LMNCO) nanotubes are synthesized by electrospinning and surface coated with different amounts of amorphous Al2O3. The effects of the coating content of Al2O3 on the structural and electrochemical performances of LMNCO nanotubes are investigated systematically. The results show that the morphologies and structures of the samples exhibit no apparent changes after being coated with Al2O3. Electrochemical tests indicate that the Al2O3-coated LMNCO nanotubes exhibit obviously enhanced electrochemical performances. The initial coulombic efficiency of surface modified LMNCO nanotubes increased from 74.9% to 85.2%, and the modified LMNCO nanotubes have a high capacity retention of 97.6% after 90 cycles at 1C. The improved electrochemical performances of the coated samples are attributed to the protective function of the uniform Al2O3 coating and the three-dimensional Li+ diffusion channel in the spinel interface layer.
机译：通过静电纺丝和表面涂覆不同量的无定形Al2O3，合成富含锰的层状阴极Li1.2Mn0.54Ni0.13CO0.13O2（LMNCO）纳米管。 系统地研究了Al2O3涂层含量对LMNCO纳米管结构和电化学性能的影响。 结果表明，样品的形态和结构表现出在涂覆Al2O3后没有明显的变化。 电化学试验表明，Al2O3涂覆的LMNCO纳米管明显增强了电化学性能。 表面改性LMNCO纳米管的初始库仑效率从74.9％增加到85.2％，改性的LMNCO纳米管在1C下90次循环后的高容量保持97.6％。 涂覆样品的改善的电化学性能归因于尖晶石界面层中的均匀Al2O3涂层的保护功能和三维Li +扩散通道。

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  • 来源
    《RSC Advances》 |2019年第4期|共8页
  • 作者

    Chen Yangwen; Wang Xinchang; Zhang Jiajia; Chen Baiyuan; Xu Junmin; Zhang Sen; Zhang Liwei;

  • 作者单位

    Zhengzhou Univ Sch Phys &

    Engn Key Lab Mat Phys Zhengzhou 450052 Henan Peoples R China;

    Zhengzhou Univ Sch Phys &

    Engn Key Lab Mat Phys Zhengzhou 450052 Henan Peoples R China;

    Zhengzhou Univ Sch Phys &

    Engn Key Lab Mat Phys Zhengzhou 450052 Henan Peoples R China;

    Jiangxi Jinhui Lithium Elect Mat CO LTD Fuzhou 336000 Fujian Peoples R China;

    Zhengzhou Univ Sch Phys &

    Engn Key Lab Mat Phys Zhengzhou 450052 Henan Peoples R China;

    Zhengzhou Univ Sch Phys &

    Engn Key Lab Mat Phys Zhengzhou 450052 Henan Peoples R China;

    Xinxiang Univ Phys &

    Elect Engn Dept Xinxiang 453000 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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