Sub-micron porous niobium solid electrolytic capacitor prepared by dealloying in a metallic melt

Joung Wook Kim; Takeshi Wada; Sung Gyoo Kim; Hidemi Kato

doi:10.1016/j.matlet.2013.11.036

Sub-micron porous niobium solid electrolytic capacitor prepared by dealloying in a metallic melt

Joung Wook Kim, Takeshi Wada, Sung Gyoo Kim, Hidemi Kato

IMR - Materials Development Division

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

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 HNO₃ yielded 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.

Original language	English
Pages (from-to)	223-226
Number of pages	4
Journal	Materials Letters
Volume	116
DOIs	https://doi.org/10.1016/j.matlet.2013.11.036
Publication status	Published - 2014

Keywords

Dealloying
Porous materials
Solid electrolytic capacitors

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10.1016/j.matlet.2013.11.036

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title = "Sub-micron porous niobium solid electrolytic capacitor prepared by dealloying in a metallic melt",

abstract = "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 HNO3 yielded 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.",

keywords = "Dealloying, Porous materials, Solid electrolytic capacitors",

author = "Kim, {Joung Wook} and Takeshi Wada and Kim, {Sung Gyoo} and Hidemi Kato",

note = "Funding Information: H.K. thanks Prof. Semboshi, IMR, Tohoku University, for helpful discussions. This work was supported by a Grant-in-Aid for Scientific Research, JSPS (No. 23656422 ), and LC-IMR, Tohoku University .",

year = "2014",

doi = "10.1016/j.matlet.2013.11.036",

language = "English",

volume = "116",

pages = "223--226",

journal = "Materials Letters",

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T1 - Sub-micron porous niobium solid electrolytic capacitor prepared by dealloying in a metallic melt

AU - Kim, Joung Wook

AU - Wada, Takeshi

AU - Kim, Sung Gyoo

AU - Kato, Hidemi

N1 - Funding Information: H.K. thanks Prof. Semboshi, IMR, Tohoku University, for helpful discussions. This work was supported by a Grant-in-Aid for Scientific Research, JSPS (No. 23656422 ), and LC-IMR, Tohoku University .

PY - 2014

Y1 - 2014

N2 - 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 HNO3 yielded 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.

AB - 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 HNO3 yielded 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.

KW - Dealloying

KW - Porous materials

KW - Solid electrolytic capacitors

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DO - 10.1016/j.matlet.2013.11.036

M3 - Article

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VL - 116

SP - 223

EP - 226

JO - Materials Letters

JF - Materials Letters

ER -

Sub-micron porous niobium solid electrolytic capacitor prepared by dealloying in a metallic melt

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Keywords

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