Superior electric storage in de-alloyed and anodic oxidized Ti-Ni-Si glassy alloy ribbons

M. Fukuhara, H. Yoshida, M. Sato, K. Sugawara, T. Takeuchi, Ichiro Seki, T. Sueyoshi

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Ti-Ni-Si glassy alloy supercapacitors, devices that store electric charge on their TiO2 surfaces that contain many nanometer-sized cavities, display many advantages over other power-source technologies. The use of de-alloying and anodic oxidization methods has made possible the synthesis of a TiO2 surface accessible to electron trapping. Until recently, no studies have addressed the "dry" electric storage in light glassy alloys. Our device realizes AC electric storage from 193 to 453 K with a voltage variation from 10 to 150 V, and DC capacitance of ∼4.8 F (∼52.8 kF/cm3), on the basis of electric double layers, deep electronic trapping sites and Shottky barriers. Further gains could be attained with surface optimization.

Original languageEnglish
Pages (from-to)477-480
Number of pages4
JournalPhysica Status Solidi - Rapid Research Letters
Volume7
Issue number7
DOIs
Publication statusPublished - 2013 Jul

Keywords

  • Amorphous TiO surfaces
  • Anodic oxidization
  • De-alloying
  • Electric storage devices
  • Glassy alloys

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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