기계화학적 볼밀링을 이용한 Mg 합금의 수소저장능 향상 연구
Improvement of Mg-based Hydrogen Storage Alloys by Mechanochemical Ball Milling
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Abstract
The mechanochemical milling of Mg and Mg2Ni alloys were carried out to examine the enhancement of hydrogen storage properties of Mg alloys. The hydrogen storage characteristics of the ball-milled products were evaluated with a Sievert-type apparatus and electrochemical test. Various intermediate compounds were obtained by chemical reactions induced during the ball milling of Mg or Mg2Ni alloys with C, Ni, Ni2Cl and Ca2Cl. The system of Mg2Ni with 10 wt% C improved markedly the kinetics of hydrogen absorption, while the hydrogen capacities were practically unchanged. The hydrogen storage alloys such as Mg-Ca can be successfully prepared by the present mechanochemical milling.