Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Cycling Characteristics of MgH2 madeby Hydriding Chemical Vapor Deposition Method

HCVD 방법으로 제조된 MgH2의 Cycling 특성

  • Park, Kyung-Duck (Department of Materials Science and Engineering, Dong-A University) ;
  • Han, Jeong-Seb (Department of Materials Science and Engineering, Dong-A University)
  • 박경덕 (동아대학교 대학원 신소재공학과) ;
  • 한정섭 (동아대학교 대학원 신소재공학과)
  • Received : 2011.07.21
  • Published : 2011.12.25
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Abstract

The cycling characteristics of $MgH_2$ made by hydriding chemical vapor deposition method have been investigated. The particle size of $MgH_2$ made by HCVD was about $1{\mu}m$. The cycling experiment was performed by measuring hydrogen quantity absorbed at 673 K and under 35 atm of hydrogen pressure for 30 min. Up to 3 cycles the hydrogen storage capacity increased, but from 4 to 6 cycles the hydrogen storage capacity decreased rapidly. During this cycling test the particle size increased gradually from $1{\mu}m$ to $6{\mu}m$. This increase was due to sintering by the high reaction temperature and the heat of reaction during hydrogen absorption. From 7 to 30 cycles, the hydrogen storage capacity was maintained at 5.8 wt%. Even after 30 cycles, the plateau pressure was constant.

Keywords

Acknowledgement

Supported by : 동아대학교

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