Aluminium-air batteries have been considered as one of the most promising next-generation energy storage devices. In this work, based on COMSOL Multiphysics, we firstly explored the effect of 3D pore size structure change on the permeation performance of the solution. The results showed that enhancing the permeation stroke of permeable solutions was beneficial to expanding the electrode reaction contact area, but it would reduce the permeation and corrosion resistance effects. For this reason, we further carried out a secondary study of TPMS structure on fluid permeation and its electrochemical performance based on the TPMS structure modelling mechanism. The results showed that the TPMS structure possessed both good solution permeation reaction rate and good corrosion resistance. Additionally, in order to further verify the validity of the simulation data, we carried out the validation of the self-corrosion rate, discharge properties, and electrochemical properties. From the final data, the discharge voltage of the TPMS structure was only 1.43 V, but its corrosion current and polarisation impedance were 2.207 × 10 A/cm and 2.2 Ω∙cm, respectively. At the same time, the structure also had good solution permeability. Therefore the porous anode structure design for aluminium-air batteries in three-dimensional state is preferred.

中文翻译：

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铝空气电池多孔结构负极的数值模拟与性能分析


铝空气电池被认为是最有前途的下一代储能装置之一。在这项工作中，基于COMSOL Multiphysics，我们首先探讨了3D孔径结构变化对溶液渗透性能的影响。结果表明，提高可渗透溶液的渗透行程有利于扩大电极反应接触面积，但会降低渗透和耐腐蚀效果。为此，我们基于TPMS结构建模机制，进一步对TPMS结构对流体渗透及其电化学性能进行了二次研究。结果表明，TPMS结构兼具良好的溶液渗透反应速率和良好的耐腐蚀性。此外，为了进一步验证模拟数据的有效性，我们进行了自腐蚀速率、放电性能和电化学性能的验证。从最终数据来看，TPMS结构的放电电压仅为1.43 V，但其腐蚀电流和极化阻抗分别为2.207 × 10 A/cm和2.2 Ω·cm。同时该结构还具有良好的溶液渗透性。因此，三维状态的铝空气电池的多孔阳极结构设计是优选的。