Numerical simulation of mass transfer enhancement in liquid metal batteries by means of electro-vortex flow

Numerical simulation of mass transfer enhancement in liquid metal batteries by means of electro-vortex flow
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电涡流增强液态金属电池传质的数值模拟

DOI:
10.1016/j.powera.2020.100004
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
D. Sadoway
D. Sadoway
中科院分区:
--
文献类型:
--
作者:
N. Weber;M. Nimtz;P. Personnettaz;T. Weier;D. Sadoway

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质量传递对于液态金属电池的有效操作是至关重要的。我们第一次表明,电动驱动的流动确实可以改善液体电极的混合,并大大减少浓度极化。模拟真实Li的放电||Bi电池在1A/cm 2时,相应的过电位降低了62%.此外,金属间相的形成被延迟,这提高了容量利用率。最后,我们证明了垂直磁场,这是源自外部源,完全改变了流动结构,并会均匀的正电极甚至更好。
Mass transfer is of paramount importance for an efficient operation of liquid metal batteries. We show for the first time that electrodynamically driven flow can indeed improve mixing of liquid electrodes, and reduces concentration polarisation substantially. Simulating the discharge of a realistic Li|| Bi cell at 1 A/cm 2, the corresponding overpotential reduces by up to 62%. Moreover, the formation of intermetallic phases is delayed, which improves capacity usage. Finally, we demonstrate that vertical magnetic fields–which are originating from external sources–change the flow structure entirely, and will homogenise the positive electrode even better.
DOI: 10.1016/j.electacta.2019.06.085
发表时间: 2019-06
影响因子: 6.6
作者:
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通讯作者: N. Weber;S. Landgraf;K. Mushtaq;Michael Nimtz;P. Personnettaz;T. Weier;Ji Zhao;D. Sadoway
DOI: --
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DOI: --
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