Aluminium-air (Al-air) batteries have been considered as one of the most promising next-generation energy storage devices. In this study, we investigated the effect of structural changes in the main body of porous aluminium anode on the electrochemical performance under the constraints of the 3D printing process using both simulation and experimental methods. By analysing the simulation results under the constraint of 3D printing process, we found that the variation of the base fillet radius affects the dimensional deviation of the porous aluminium anode. As the radius of the fillet increases, the degree of warpage deformation gradually decreases. For this reason, we experimentally verified the self-corrosion rate, electrochemical and discharge properties of aluminium anodes under the same process parameters. The test results are consistent with the simulation analysis. With the increase of fillet radius, the self-corrosion rate of anode gradually decreases and the electrochemical activity gradually increases. Meanwhile, the discharge voltage was as low as 1.55 V in the periphery without rounded corners, and increased by 1.3 % and 3.2 % when the periphery radius was 1 mm and 2 mm, respectively. This research result provides a new method for other researchers to further improve the overall performance of aluminium-air batteries.

中文翻译：

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3D打印多孔铝阳极结构对电化学性能的影响


铝空气（Al-air）电池被认为是最有前途的下一代储能装置之一。在本研究中，我们采用模拟和实验方法研究了3D打印工艺约束下多孔铝阳极主体的结构变化对电化学性能的影响。通过分析3D打印工艺约束下的模拟结果，我们发现基底圆角半径的变化影响多孔铝阳极的尺寸偏差。随着圆角半径的增大，翘曲变形程度逐渐减小。为此，我们通过实验验证了相同工艺参数下铝阳极的自腐蚀速率、电化学和放电性能。测试结果与仿真分析一致。随着圆角半径的增加，阳极的自腐蚀速率逐渐降低，电化学活性逐渐增强。同时，在没有圆角的外围，放电电压低至1.55V，当外围半径为1mm和2mm时，放电电压分别增加1.3%和3.2%。该研究成果为其他研究人员进一步提高铝空气电池的整体性能提供了新方法。