Modeling of Ion Agglomeration in Magnesium Electrolytes and its Impacts on Battery Performance.,ChemSusChem

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Modeling of Ion Agglomeration in Magnesium Electrolytes and its Impacts on Battery Performance.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-05-28 , DOI: 10.1002/cssc.202001034
Janina Drews _{1,

2} , Timo Danner _{1,

2} , Piotr Jankowski ₃ , Tejs Vegge ₃ , Juan Maria García Lastra ₃ , Runyu Liu ₄ , Zhirong Zhao-Karger ₄ , Maximilian Fichtner _{2,

4} , Arnulf Latz _{1,

2,

5}

Affiliation

The choice of electrolyte has a crucial influence on the performance of rechargeable magnesium batteries. In multivalent electrolytes an agglomeration of ions to pairs or bigger clusters may affect the transport in the electrolyte and the reaction at the electrodes. In this work the formation of clusters is included in a general model for magnesium batteries. In this model, the effect of cluster formation on transport, thermodynamics and kinetics is consistently taken into account. The model is used to analyze the effect of ion clustering in magnesium tetrakis(hexafluoroisopropyloxy)borate in dimethoxyethane as electrolyte. It becomes apparent that ion agglomeration is able to explain experimentally observed phenomena at high salt concentrations.

中文翻译：

镁电解质中离子团聚的建模及其对电池性能的影响。

电解质的选择对可充电镁电池的性能具有至关重要的影响。在多价电解质中，离子聚集成成对或更大的簇可能会影响电解质中的传输以及电极上的反应。在这项工作中，团簇的形成包含在镁电池的通用模型中。在该模型中，始终考虑了团簇形成对运输，热力学和动力学的影响。该模型用于分析在四甲氧基乙烷中的四（六氟异丙氧基）硼酸镁中离子簇的影响。显然，离子团聚能够解释高盐浓度下实验观察到的现象。

更新日期：2020-07-22

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