Development of AB2-Type Zr-Mn-Ni Hydrogen-Storage Alloys for Ni-MH Secondary Battery

Ni-MH 2차전지용 AB2계 Zr-Mn-Ni 수소저장합금의 개발

  • Kwon, IkHyun (Research Institute of Industrial Technology Division of Advanced Materials Engineering, Chonbuk National University) ;
  • Ahn, DongSu (Viable Korea Co., Ltd.) ;
  • Park, HyeRyoung (Division of Applied Chemical Engineering, Chonnam National University) ;
  • Song, MyoungYoup (Research Institute of Industrial Technology Division of Advanced Materials Engineering, Chonbuk National University)
  • 권익현 (전북대학교 신소재공학부, 공업기술연구소) ;
  • 안동수 (바이어블 코리아(주)) ;
  • 박혜령 (전남대학교 응용화학부) ;
  • 송명엽 (전북대학교 신소재공학부, 공업기술연구소)
  • Published : 2001.03.15

Abstract

The alloys $ZrMn_2Ni_x$ (x=0.0, 0.3, 0.6, 0.9 and 1.2) as the alloys of Zr-Mn-Ni three component system were prepared and their hydrogen-storage properties and their electrochemical properties were investigated. The C14 Laves phase formed in all the alloys $ZrMn_2Ni_x$. Among these alloys $ZrMn_2Ni_{0.6}$ was activated relatively easily(after about 11 charge-discharge cycles), and had the largest discharge capacity(max. 45mAh/g). For all the alloys Zr was dissolved most easily into the 6M KOH solution. More Mn and Ni were dissolved from the $ZrMn_2Ni_{0.6}$ alloy than from the other alloys. Due to the active charge and discharge of the $ZrMn_2Ni_{0.6}$ alloys, related to the easier activation and the larger discharge capacity, Zr, Mn and Ni in this alloy were considered to be dissolved more easily into the 6M KOH solution, compared with the other alloys.

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Acknowledgement

Supported by : 한국학술진흥재단