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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of High Energy Ballmilling on the Discharge Properties of Mg-Ni Based Electrodes

고에너지 볼밀링이 Mg-Ni계 수소저장합금전극의 방전특성에 미치는 영향

  • Han, Ji-Seong (Department of Metallurgical & Materials Engineering, Gyeongsang National University, Research Center for Aircraft Parts Technology) ;
  • Kim, Ki-Won (Department of Metallurgical & Materials Engineering, Gyeongsang National University, Research Center for Aircraft Parts Technology) ;
  • Ahn, In-Shup (Department of Metallurgical & Materials Engineering, Gyeongsang National University, Research Center for Aircraft Parts Technology) ;
  • Hur, Bo-Yong (Department of Metallurgical & Materials Engineering, Gyeongsang National University, Research Center for Aircraft Parts Technology) ;
  • Ahn, Hyo-Jun (Department of Metallurgical & Materials Engineering, Gyeongsang National University, Research Center for Aircraft Parts Technology)
  • 한지성 (경상대학교 금속재료공학과, 항공기부품기술연구센타) ;
  • 김기원 (경상대학교 금속재료공학과, 항공기부품기술연구센타) ;
  • 안인섭 (경상대학교 금속재료공학과, 항공기부품기술연구센타) ;
  • 허보영 (경상대학교 금속재료공학과, 항공기부품기술연구센타) ;
  • 안효준 (경상대학교 금속재료공학과, 항공기부품기술연구센타)
  • Published : 1999.03.15
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Abstract

In order to study the effect of high energy ball milling on the $Mg_2Ni+Ni$, $Mg_2Ni+0.5Ni+0.5Al$ powders, we have investigated on the discharge properties, microstructures. The powder size of samples decreased as ball milling time. From the XRD results, the crystal structure of $Mg_2Ni+Ni$ mixed powders were changed to amorphous or nano-structure after 60hr ball milling. The discharge capacities of both $Mg_2Ni+Ni$ and $Mg_2Ni+0.5Ni+0.5Al$ powders increased, with increasing ballmilling time, the maximum capacity(342mAh/g) was shown for the 60 hrs ballmilled $Mg_2Ni+Ni$ sample. The capacity decreased drastically after a few charge-discharge cycles.

Keywords

Acknowledgement

Supported by : 한국과학재단