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首页> 外文期刊>Journal of Materials Research >Structural evolution of electrodes in the NCR and CGR cathode-containing commercial lithium-ion batteries cycled between 3.0 and 4.5 V: An operando neutron powder-diffraction study
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Structural evolution of electrodes in the NCR and CGR cathode-containing commercial lithium-ion batteries cycled between 3.0 and 4.5 V: An operando neutron powder-diffraction study

机译：NCR和CGR含阴极的商用锂离子电池中电极在3.0至4.5 V之间循环的电极结构演变：一项操作中子粉末衍射研究

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摘要

The dissimilar lattice-evolution of the isostructural layered Li(Ni,Co,Al)O_2 (NCR) and Li(Ni,Co, Mn)O_2 (CGR) cathodes in commercial lithium-ion batteries during overcharging/discharging was examined using operando neutron powder-diffraction. The stacking axis (c parameter) of both cathodes expands on initial lithiation and contracts on further lithiation. Although both the initial increase and later decrease are smaller for the CGR cathode, the overall change between battery charged and discharged states of the c parameter is larger for the CGR (1.29%) than for the NCR cathode (0.33%). We find these differences are correlated to the transition metal to oxygen bond (as measured through the oxygen positional-parameter) which is specific to the different cathode chemistries. Finally, we note the formation of and suggest a model for a LiC_x intermediate between graphite and LiC_(12) in the anode of both batteries.
机译：使用操作中子研究了商业锂离子电池中等结构层状Li（Ni，Co，Al）O_2（NCR）和Li（Ni，Co，Mn）O_2（CGR）阴极在充电/放电过程中的不同晶格演化粉末衍射。两个阴极的堆叠轴（c参数）在初始锂化时扩展，并在进一步锂化时收缩。尽管CGR阴极的初始增加和后来的减小都较小，但是CGR的c参数的电池充电状态和放电状态之间的总体变化（1.29％）大于NCR阴极（0.33％）。我们发现这些差异与特定于不同阴极化学的过渡金属与氧键（通过氧位置参数测量）相关。最后，我们注意到两个电池阳极中的石墨和LiC_（12）之间的LiC_x中间体的形成并提出了一个模型。

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  • 来源
    《Journal of Materials Research》 |2015年第3期|373-380|共8页
  • 作者

    Wei Kong Pang; Moshiul Alam; Vanessa K. Peterson; Neeraj Sharma;

  • 作者单位

    Australian Nuclear Science and Technology Organisation, Kirrawee DC, New South Wales 2232, Australia School of Mechanical, Materials, and Mechatronic Engineering, Institute for Superconducting & Electronic Materials, Faculty of Engineering, University of Wollongong, New South Wales 2522, Australia;

    Australian Nuclear Science and Technology Organisation, Kirrawee DC, New South Wales 2232, Australia School of Chemistry, UNSW Australia, Sydney, New South Wales 2052, Australia;

    Australian Nuclear Science and Technology Organisation, Kirrawee DC, New South Wales 2232, Australia;

    School of Chemistry, UNSW Australia, Sydney, New South Wales 2052, Australia;

  • 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);
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