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arXiv 2201.09661cond-mat.mtrl-sciphysics.chem-ph
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锂铋液态金属电池的电池电压模型

Cell voltage model for Li-Bi liquid metal batteries

Norbert Weber, Carolina Duczek, Gerrit M. Horstmann, Steffen Landgraf, Michael Nimtz, Paolo Personnettaz, Tom Weier, Donald R. Sadoway

摘要:

锂-铋锂电池是最好的液态金属电池之一。一个简单而快速的准一维电池电压模型,这样的设备。平衡电池电势是从从平衡电池电势的多个研究中得出的数据的复杂二维拟合获得的,并且与相图一致。同样,针对不同的电池几何形状,提供了跨电解质的欧姆电势降的几个分析和拟合函数。质量传输超电势起源于锂到铋合金化建模通过求解扩散方程,无论是解析或数值,并占正极的体积变化。该模型的适用性和局限性,最后说明在三个不同的实验设置。

英文摘要:

Lithium-bismuth bimetallic cells are amongst the best explored liquid metal batteries. A simple and fast quasi-one-dimensional cell voltage model for such devices is presented. The equilibrium cell potential is obtained from a complex two-dimensional fit of data drawn from multiple studies of equilibrium cell potential and rendered congruent with the phase diagram. Likewise, several analytical and fit functions for the ohmic potential drop across the electrolyte are provided for different battery geometries. Mass transport overpotentials originating from the alloying of Li into Bi are modelled by solving a diffusion equation, either analytically or numerically, and accounting for the volume change of the positive electrode. The applicability and limitations of the model are finally illustrated in three distinct experimental settings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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