Liquid metal batteries - materials selection and fluid dynamics

Final LIMTECH Colloquium and International Symposium on Liquid Metal Technologies

材料科学;金属学

Weier, T.^1 ; Bund, A.^2 ; El-Mofid, W.^2 ; Horstmann, G.M.^1 ; Lalau, C.-C.^2 ; Landgraf, S.^1 ; Nimtz, M.^1 ; Starace, M.^1 ; Stefani, F.^1 ; Weber, N.^1

Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstr. 400, Dresden

01328, Germany^1

Electrochemistry and Electroplating Group, Technische Universitat Ilmenau, Gustav-Kirchhoff-Str. 6, Ilmenau

98693, Germany^2

关键词: Electrode material;    Electrolyte layers;    Flow Phenomena;    Future energies;    High current densities;    Magnetohydrodynamic instabilities;    Materials selection;    Renewable electricity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/228/1/012013/pdf
DOI  :  10.1088/1757-899X/228/1/012013

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Liquid metal batteries are possible candidates for massive and economically feasible large-scale stationary storage and as such could be key components of future energy systems based mainly or exclusively on intermittent renewable electricity sources. The completely liquid interior of liquid metal batteries and the high current densities give rise to a multitude of fluid flow phenomena that will primarily influence the operation of future large cells, but might be important for today's smaller cells as well. The paper at hand starts with a discussion of the relative merits of using molten salts or ionic liquids as electrolytes for liquid metal cells and touches the choice of electrode materials. This excursus into electrochemistry is followed by an overview of investigations on magnetohydrodynamic instabilities in liquid metal batteries, namely the Tayler instability and electromagnetically excited gravity waves. A section on electro-vortex flows complements the discussion of flow phenomena. Focus of the flow related investigations lies on the integrity of the electrolyte layer and related critical parameters.