3D Simulation of Cell Design Influences on Sodium–Iodine Battery Performance,Energy Technology

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3D Simulation of Cell Design Influences on Sodium–Iodine Battery Performance
Energy Technology ( IF 3.6 ) Pub Date : 2020-12-19 , DOI: 10.1002/ente.202000857
Felix Gerbig ₁ , Susanne Cernak ₁ , Hermann Nirschl ₁

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This publication deals with the spatially resolved simulation of a sodium–iodine secondary battery. The anode compartment consists of molten sodium and the cathode compartment contains a high-conductivity metal disc as electrode and an aqueous catholyte. The latter comprises iodide, triiodide, dissolved iodine, and sodium ions. A finite volume approach is proposed to model the transport processes and electrochemical reactions focusing on the positive half-cell. The study investigates the influences of cathode length, C-rate, electric conductivity, and molar concentrations on cell performance. It considers solubility limits and predicts diffusion limitation as the major constraint for the operating window. The presented investigations are confined to a simple cathode geometry. However, the results demonstrate the capability of the model to design sodium–iodine half-cells.

中文翻译：

电池设计对钠碘电池性能影响的 3D 模拟

该出版物涉及钠碘二次电池的空间分辨模拟。阳极室由熔融钠组成，阴极室包含作为电极的高导电金属盘和阴极电解液。后者包括碘化物、三碘化物、溶解碘和钠离子。提出了一种有限体积方法来模拟正半电池的传输过程和电化学反应。该研究调查了阴极长度、C 速率、电导率和摩尔浓度对电池性能的影响。它将溶解度限制和预测扩散限制作为操作窗口的主要约束条件。所提出的研究仅限于简单的阴极几何形状。然而，

更新日期：2020-12-19

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