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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effects of the Addition of Mn and $AB_5$ Type Alloy on the Electrochemical Characteristics of Ti-Cr-V BCC Type Alloys

BCC계 Ti-Cr-V 합금의 전기화학적 특성에 미치는 Mn 및 $AB_5$계 합금 첨가 효과

  • Kim, J.Y. (Department of Materials Science and Engineering, Chonnam National University) ;
  • You, J.H. (Department of Materials Science and Engineering, Chonnam National University) ;
  • Park, C.N. (Department of Materials Science and Engineering, Chonnam National University) ;
  • Park, C.J. (Department of Materials Science and Engineering, Chonnam National University) ;
  • Choi, J. (Department of Advanced Materials Engineering, Hanlyo University) ;
  • Cho, S.W. (Korea Institute of Geoscience and Mineral Resources)
  • 김종연 (전남대학교 신소재공학과) ;
  • 유정현 (전남대학교 신소재공학과) ;
  • 박충년 (전남대학교 신소재공학과) ;
  • 박찬진 (전남대학교 신소재공학과) ;
  • 최전 (한려대학교 신소재공학과) ;
  • 조성욱 (한국지질자원연구소)
  • Published : 2007.03.15
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Abstract

We investigated the effects of the addition of Mn and $AB_5$ type alloy on the electrochemical characteristics of Ti-Cr-V BCC type alloys as anode materials for Ni-MH battery. The activation behavior and discharge capacity of the BCC type alloys were significantly improved by ball-milling with the $LmNi_{4.1}Al_{0.25}Mn_{0.3}Co_{0.65}$ alloy, because the $AB_5$ type alloy acted as hydrogen path on the surface of the BCC type alloy. Among the Mn substituted alloys($Mn=0.03%{\sim}0.08%$), the $Ti_{0.32}Cr_{0.38}Mn_{0.05}V_{0.25}$ alloy ball-milled with $AB_5$ type alloy exhibited the greatest discharge capacity of $336\;mAh{\cdot}g^{-1}$. In addition, Mn substituted alloys exhibited the lower plateau pressure in P-C- T curve, the better hydrogen storage capacity and faster surface activation compared with the alloy without Mn.

Keywords

References

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