Sub-micron porous niobium solid electrolytic capacitor prepared by dealloying in a metallic melt
Sub-micron porous niobium solid electrolytic capacitor prepared by dealloying in a metallic melt
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DOI：
10.1016/j.matlet.2013.11.036
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发表时间：
2014-02
影响因子：
3
通讯作者：
Joung Wook Kim;T. Wada;Sung Gyoo Kim;H. Kato
中科院分区：
文献类型：
--
作者：
Joung Wook Kim;T. Wada;Sung Gyoo Kim;H. Kato
用金属熔体脱合金化法制备了多孔Nb。将Ni-Nb前驱体浸入镁熔体中，然后将镍选择性地溶解到熔体中。剩余的Nb自组织成双连续结构。在硝酸水溶液中去除镁溶剂，可得到开孔亚孔结构的Nb，经阳极氧化后应用于固体电解电容器中。韧带大小随浸泡时间的减少而减小。这通过将比表面积增加到3.92nm2/g，将质量比电容增加到500,000μFV/g。
Porous Nb was prepared by dealloying in a metallic melt. A Ni–Nb precursor was immersed in a Mg melt, and Ni was selectively dissolved into the melt. The remaining Nb self-organized into a bicontinuous structure. Removing the Mg solvent in aqueous HNO3yielded open-cell sub-μm porous Nb, which was applied in solid electrolytic capacitors after anodization. Ligament size decreased with decreasing immersion time. This increased the mass-specific capacitance to 500,000 μFV/g, by increasing the specific surface area to 3.92 m2/g.