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

  • 제6권1호
  • /
  • Pages.35-41
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  • 1995
  • /
  • 1738-7264(pISSN)
  • /
  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
권호 표지

(Mm)Ni5계 수소저장합금의 전극 특성

Electrode Characteristics of the (Mm)Ni5-Based Hydrogen Storage Alloys

  • 한동수 (전남대학교 금속공학과) ;
  • 최승준 (전남대학교 금속공학과) ;
  • 장민호 (전남대학교 금속공학과) ;
  • 최전 (전남대학교 금속공학과) ;
  • 박충년 (전남대학교 금속공학과)
  • Han, D.S. (Dept. of Metallurgical Engineering Chonnam National University) ;
  • Choi, S.J. (Dept. of Metallurgical Engineering Chonnam National University) ;
  • Chang, M.H. (Dept. of Metallurgical Engineering Chonnam National University) ;
  • Choi, J. (Dept. of Metallurgical Engineering Chonnam National University) ;
  • Park, C.N. (Dept. of Metallurgical Engineering Chonnam National University)
  • 발행 : 1995.06.30
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초록

The MmNi-based alloy electrode was studied for use as a negative electrode in Ni-MH battery. Alloys with $MmNi_5-_xM_x$(M=Co,Al,Mn) composition were synthesized, and their electrode charateristics of activation rate, temperature dependence, electrode capacity and cycle life were investigated. With increasing Al content and decreasing Mn content in the alloys, the discharge capacity increased while the cycle life decreased. As x in $MmNi_5-_xM_x$ increased from 1.5 to 2.0, decreasing the Ni content, the discharge capacity, the low temperature property and the rate capability decreased. However its cycle life was improved. Increasing Co content resulted in a prolonged cycle life and decrease of high rate discharge capacity. It can be concluded that the most promising alloy in view of discharge capacity and cycle life is $MmNi_{3.5}Co_{0.7}Al_{0.5}Mn_{0.3}$.

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