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

Journal of Power Sources Advances

Michael Nimtz¹  Norbert Weber²  Donald Sadoway²  Paolo Personnettaz²  Tom Weier² 

[1] Corresponding author.;Helmholtz-Zentrum Dresden – Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany;

关键词: Liquid metal battery;    Concentration polarisation;    Electro-vortex flow;    Mixing;    Mass transfer enhancement;   

DOI  :  

来源: DOAJ

【 摘 要 】

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/cm2, 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.

【 授权许可】

Unknown