Enlarging the surface area of an electrolytic capacitor of porous niobium by MgCe eutectic liquid dealloying
Enlarging the surface area of an electrolytic capacitor of porous niobium by MgCe eutectic liquid dealloying
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DOI：
10.1016/j.scriptamat.2016.05.014
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发表时间：
2016-09
影响因子：
6
通讯作者：
Joung Wook Kim;T. Wada;Sung Gyoo Kim;H. Kato
中科院分区：
文献类型：
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作者：
Joung Wook Kim;T. Wada;Sung Gyoo Kim;H. Kato
为了增加用作电容器的Nb阳极球的表面积，同时减小其韧带尺寸，我们在镁熔体中添加了Ce；脱合金反应发生在低于1023℃的温度下，这是以前记录的此类反应的最低温度。通过对脱合金化动力学的分析，我们找到了最佳的脱合金化条件，使镁95.7Ce4.3熔体中的韧带最小尺寸为100nm.420Ce4.3熔体的脱合金化温度为923kK，使Nb阳极球的比表面积增加到4.3km2/g，质量比电容提高到87.5万μFV/g。
To increase the surface area while decreasing the ligament size of an Nb anode pellet for use as a capacitor, we added Ce to an Mg melt; the dealloying reaction occurred at temperatures lower than 1023 K, the previously lowest recorded temperature for such a reaction. By analyzing the dealloying kinetics, we found the optimum dealloying conditions to produce a minimum ligament size of 100 nm in the Mg95.7Ce4.3melt: 923 K for 420 s. Using these conditions, we increased the specific surface area of the Nb anode pellet to 4.3 m2/g, which increased its mass-specific capacitance to 875,000 μFV/g.