The effects of the structure characteristics of sintered aluminum powder, such as particle size and thickness of the sintered aluminum layer, on the mechanical properties, electrochemical properties, and specific capacitance of sintered anode aluminum foil for electrolytic capacitors were investigated using scanning electron microscopy, adhesion and anti-bending tests, electrochemical tests, and specific capacitance tests. The results indicate that reducing the particle size while maintaining the same sintered layer thickness can enhance the specific capacitance of anode foils for aluminum electrolytic capacitors. The optimal particle size was found to be 2.25 μm. Increasing the thickness of the sintered layer can increase the specific capacitance, but it also leads to higher interface resistance and decreased anti-bending performance. The optimal comprehensive performance is achieved when the thickness of both sides of the sintered aluminum powder layer is approximately 65 μm. At this thickness, the specific capacitance is 1.1910 μF/cm, the interface resistance is 511.5 Ω, and the number of bending can reach 85 cycles, satisfying the requirements of aluminum electrolytic capacitors.

中文翻译：

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烧结铝粉层结构对烧结阳极铝箔性能的影响

采用扫描电镜、附着力研究了烧结铝粉的粒度、烧结铝层厚度等结构特征对电解电容器用烧结阳极铝箔力学性能、电化学性能和比电容的影响。以及抗弯曲测试、电化学测试和比电容测试。结果表明，在保持相同烧结层厚度的同时减小颗粒尺寸可以提高铝电解电容器阳极箔的比电容。发现最佳粒径为 2.25 μm。增加烧结层厚度可以提高比电容，但也会导致界面电阻升高，抗弯曲性能下降。当烧结铝粉层两侧厚度约为65μm时，综合性能最佳。在此厚度下，比电容为1.1910μF/cm，界面电阻为511.5Ω，弯曲次数可达85次，满足铝电解电容器的要求。