Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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The electrochemical properties of Zr-Ti-V-Ni-Mn hydrogen storage alloys with various compositions for an electrode of Ni-MH secondary battery

Ni-MH 2차 전기 전극용 Zr-Ti-V-Ni-Mn계 수소저장합금의 조성에 따른 전기화학적 특성

  • Choi, Seung-Jun (Dept. of Metallurgical Eng., Chonnam National University and HECS) ;
  • Jung, So-Yi (Dept. of Metallurgical Eng., Chonnam National University and HECS) ;
  • Park, Choong-Nyeon (Dept. of Metallurgical Eng., Chonnam National University and HECS)
  • 최승준 (전남대학교 금속공학과, 전남대학교 지역협력센타) ;
  • 정소이 (전남대학교 금속공학과, 전남대학교 지역협력센타) ;
  • 박충년 (전남대학교 금속공학과, 전남대학교 지역협력센타)
  • Published : 1999.12.15
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Abstract

Effects of alloy modification for the $Zr_{0.7}Ti_{0.3}V_{0.4}Ni_{1.2}Mn_{0.4}$ alloy as an electrode materials have been investigated. When Ti in the alloy was partially substituted by Zr, the hydrogen storage capacity and subsequently the discharge capacity increased significantly, however, the activation characteristic and rate capability decreased. By substituting Mn with other elements (Cr, Co and Fe) in the alloy, discharge capacity decreased but the cycle life and rate capability were improved. Considering both the discharge capacity, the high rate discharge property and cycle life, the $Zr_{0.7}Ti_{0.3}V_{0.4}Ni_{1.2}Mn_{0.3}Cr_{0.1}$ alloy among the alloys subjected to the test was found to be a prominent alloy for a practical usage.

Keywords

Acknowledgement

Supported by : 한국 학술 진흥재단