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

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

Research output: Contribution to journalArticle

24 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 languageEnglish
Pages (from-to)223-226
Number of pages4
JournalMaterials Letters
Volume116
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • Dealloying
  • Porous materials
  • Solid electrolytic capacitors

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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