Influence of the mixing speed in the rheology of NMC622-based Li-ion battery electrode slurries

IF 5.4 Q2 CHEMISTRY, PHYSICAL Journal of Power Sources Advances Pub Date : 2024-02-13 DOI:10.1016/j.powera.2024.100141
Diana Zapata Dominguez , Jiahui Xu , Yasmina Boudjema , Siwar Ben Hadj Ali , Franco M. Zanotto , Alejandro A. Franco
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Abstract

Finding a correlation between the rheology of an electrode slurry and the mixing variables is challenging due to the complex interactions among the materials in the suspension. Here, we report a systematic study of the mixing speed and how this variable impacts the slurry rheology of the Nickel Manganese Cobalt Oxide (NMC622) positive electrode at 2000, 3000, and 4000 rpm and maintaining constant the other mixing parameters. We partially combined the slurry components and compared the rheology results with the complete formulation. This systematic study shows differences in viscosity depending on mixing speed and the slurry component combination. In addition, frequency oscillatory sweeps were used to obtain information on the slurry microstructure, showing changes depending on the nature of component interactions. The slurries were also casted, dried, and calendered. Numerical simulations were also performed to analyze the experimental findings. Understanding the slurry rheology and the interaction of the formulation components is fundamental for further engineering electrode manufacturing and analysis of the dried electrode's output properties.

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混合速度对基于 NMC622 的锂离子电池电极浆料流变性的影响
由于悬浮液中的材料之间存在复杂的相互作用,因此找到电极浆料流变性与混合变量之间的相关性具有挑战性。在此,我们报告了对搅拌速度的系统研究,以及该变量如何影响镍锰钴氧化物(NMC622)正极在 2000、3000 和 4000 rpm 转速下的浆液流变性,并保持其他搅拌参数不变。我们部分合并了浆料成分,并将流变结果与完整配方进行了比较。这项系统性研究表明,粘度的差异取决于搅拌速度和浆料成分组合。此外,我们还使用频率振荡扫描来获取有关泥浆微观结构的信息,结果表明其变化取决于组分相互作用的性质。还对泥浆进行了浇铸、干燥和压延。还进行了数值模拟,以分析实验结果。了解泥浆流变学和配方成分的相互作用对于进一步的工程电极制造和分析干燥电极的输出特性至关重要。
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来源期刊
CiteScore
9.10
自引率
0.00%
发文量
18
审稿时长
64 days
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