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The effect of solid content on the rheological properties and microstructures of a Li-ion battery cathode slurry

机译：固体含量对锂离子电池阴极浆料流变性能和微观结构的影响

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摘要

The development of new materials and the understanding of the microstructure formation of electrodes have become increasingly important for improving Li-ion battery performance. In this study, we investigate the effect of solid content on the rheological properties of and the microstructures in the cathode slurry prepared from Ni-rich materials. With long-chain structures, PVDF molecules can change their configurations when they come into contact with the solid particles in slurries, and their bridging function can change with the solid content in the slurry. Below the optimum content, particle sedimentation easily takes place. Above the optimum content, excessive yield stress is created in the slurry, and this stress is not conducive to homogeneous distribution of the components. The rheological properties of the slurries vary greatly under different solid contents. We investigated the uniformity and stability of the slurry prepared from Ni-rich materials and found that the most suitable solid content of the slurry lies in the range from 63.9% to 66.3%. Our work might assist in the production of high-performance Li-ion batteries that are made using an electrode slurry.
机译：新材料的开发和对电极微观结构形成的理解对改善锂离子电池性能越来越重要。在这项研究中，我们研究了固体含量对由Ni-材料制备的阴极浆料中的流变性质和微观结构的影响。通过长链结构，当它们在浆料中与固体颗粒接触时，PVDF分子可以改变它们的配置，并且它们的桥接功能可以随着浆料中的固体含量而变化。低于最佳含量，容易发生粒子沉降。高于最佳含量，在浆料中产生过量的屈服应力，并且这种应力不利于组分的均匀分布。浆料的流变性质在不同的固体含量下大大变化。我们研究了由富镍材料制备的浆料的均匀性和稳定性，发现最合适的浆料固体含量在63.9％至66.3％的范围内。我们的作品可能有助于生产使用电极浆料制成的高性能锂离子电池。

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  • 来源
    《RSC Advances》 |2020年第33期|共11页
  • 作者

    Ouyang Lixia; Wu Zhaohui; Wang Jun; Qi Xiaopeng; Li Qiang; Wang Jiantao; Lu Shigang;

  • 作者单位

    GRINM Grp Co Ltd Natl Power Battery Innovat Ctr Beijing 100088 Peoples R China;

    China Automot Battery Res Inst Co Ltd Beijing 100088 Peoples R China;

    Zhengzhou Univ Aeronaut Sci Inst Big Data Zhengzhou 450046 Peoples R China;

    China Automot Battery Res Inst Co Ltd Beijing 100088 Peoples R China;

    GRINM Grp Co Ltd Natl Power Battery Innovat Ctr Beijing 100088 Peoples R China;

    GRINM Grp Co Ltd Natl Power Battery Innovat Ctr Beijing 100088 Peoples R China;

    GRINM Grp Co Ltd Natl Power Battery Innovat Ctr Beijing 100088 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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