Electrochemical properties of Ti45-xZr 30+xNi25 (x = -4, 0, 4) quasicrystal and amorphous electrodes produced by mechanical alloying

Youhei Ariga, Akito Takasaki, Cihiro Kuroda, A. Kulka

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9 Citations (Scopus)

Abstract

The effect of substitution of Zr for Ti on the discharge performance of electrodes consisted of Ti45-xZr30+ xNi25 (x = -4, 0, 4) powders produced by mechanical alloying (MA) and subsequent annealing was investigated by a three-electrode cell at room temperature. All the powders after MA were amorphous, but a subsequent annealing caused the formation of the icosahedral (i) quasicrystal phase with a Ti2Ni type crystal phase as the second phase. The discharge capacities for both the amorphous and the i-phase electrodes decreased with increasing amount of Zr substituted for Ti. The maximum discharge capacity achieved was about 130 mA h/g from a (Ti49Zr26Ni 25) i-phase electrode at the first discharge process. The discharge capacities of the amorphous electrodes were lower than those of the i-phase ones if the composition levels were alike.

Original languageEnglish
Pages (from-to)S251-S254
JournalJournal of Alloys and Compounds
Volume580
Issue numberSUPPL1
DOIs
Publication statusPublished - 2013 Apr 29

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Keywords

  • Amorphous
  • Discharge capacity
  • Mechanical alloying
  • Quasicrystal
  • Titanium-zirconium-nickel

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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