A Study on the V22Ti16Zr16Ni39X7(X=Cr, Co, Fe, Mn, Al) Metal Hydride Electrodes

V22Ti16Zr16Ni39X7(X=Cr, Co, Fe, Mn, Al) 금속수소화물전극에 관한 연구

  • 김정선 (서울대학교 금속공학과) ;
  • 조원일 (한국과학기술연구원 화공연구부) ;
  • 조병원 (한국과학기술연구원 화공연구부) ;
  • 윤경석 (한국과학기술연구원 화공연구부) ;
  • 김상주 (서울대학교 금속공학과)
  • Published : 1994.06.30


Lattice structure, hydrogen absorption characteristics, discharge capacity and cycle life of $V_{22}Ti_{16}Zr_{16}Ni_{39}X_7$(X= Cr, Co, Fe, Mn, Al) alloys were investigated. The matrix phases of these alloys were the C14 Laves phase. Chromium-containing alloy had a vanadium-rich phase in addition to the Laves phase. The chromium, maganese, or aluminum-containing alloys had lower hydrogen equilibrium pressure and larger hydrogen absorption content than the cobalt or iron-containing alloys. The discharge capacities of these alloys were 270~330mAh/g. The discharge capacity according to the alloying element X decreased in the order of Mn>Cr>Co, Al)Fe. The charge/discharge cycle lives of the chromium, cobalt or iron-containing alloys were longer than those of maganese or aluminum-containing alloys due to the lower vanadium dissolution rate.