A study of the activation behaviour of ZrCrNiLa metal hydride electrodes in alkaline solution

Soo Ryoung Kim, Jai Young Lee, Hyung-Ho Park

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The hydrogen absorption behaviour of ZrCrNi C14 Laves phase alloys pre-treated in various ways is studied during galvanostatic charging in KOH solution. It is found that the surface oxide layers prohibit hydrogen absorption. In order to investigate the effects of surface properties on the activation behaviours of ZrCrNi and ZrCrNiLa0.05 electrodes, their surfaces are analysed by means of X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). The surface property of ZrCrNiLa0.05 is identical to that of ZrCrNi except for La oxide at the surface. To investigate the effect of adding the element, Ti instead of La is added to ZrCrNi in excess. The Ti-containing alloy shows a poor activation behaviour in alkaline solution. From the results of the surface analysis on ZrCrNi, ZrCrNiLa0.05 and ZrCrNiTi0.05, alloys that show different activation behaviours in alkaline solution, it is suggested that the nature of the oxide layer formed on the surface plays a key role on the activation process of the metal hydrides in alkaline solution.

Original languageEnglish
Pages (from-to)225-229
Number of pages5
JournalJournal of Alloys and Compounds
Volume205
Issue number1-2
DOIs
Publication statusPublished - 1994 Jan 1

    Fingerprint

All Science Journal Classification (ASJC) codes

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

Cite this