Hydrogen Storage Properties of Mg-10wt.%MnO Prepared by Reactive Mechanical Grinding

반응성 기계적 분쇄에 의해 제조한 Mg-10wt.% MnO의 수소 저장 성질

  • Song, Myoung-Youp (Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University) ;
  • Kwon, Ik-Hyun (Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University) ;
  • Kwon, Sung-Nam (Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University) ;
  • Park, Chan-Gi (Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University) ;
  • Bae, Jong-Soo (Nanopowder Materials Group, Materials Technology Department, Korea Institute of Machinery & Materials)
  • 송명엽 (전북대학교 공학연구원 공업기술연구센터 신소재공학부) ;
  • 권익현 (전북대학교 공학연구원 공업기술연구센터 신소재공학부) ;
  • 권성남 (전북대학교 공학연구원 공업기술연구센터 신소재공학부) ;
  • 박찬기 (전북대학교 공학연구원 공업기술연구센터 신소재공학부) ;
  • 배종수 (한국기계연구원 재료연구부 나노분말재료그룹)
  • Published : 2005.03.15

Abstract

수소 분위기에서 10wt.%MnO와 기계적인 분쇄(반응성 기계적 분쇄)에 의해 Mg의 수소 저장 성질을 향상시켰다. 회전 속도는 250 rpm, 밀링시간은 2 h, 그리고 시료 대 볼 중량비는 1/45이었다. 준비한 Mg-10wt.%MnO 시료는 활성화를 위한 수소화물 형성 분해 싸이클링이 필요없었으며, 첫 번째 싸이클 593k 12 bar $H_2$에서, 10분 동안에 3.12wt.%, 60분 동안에 3.95wt.%의 수소를 흡수하였다. 또한 Mg-10wt.%MnO는 593k 0.8 bar $H_2$에서 60분 동안에 2.12wt.%의 수소를 방출하였다. MnO와 Mg의 방응성 분쇄는, 핵생성을 용이케하고 (Mg 입자의 표면에 결함 형성과 첨가물에 의해), Mg 입자의 표면에 crack을 만들어 Mg의 입자 크기를 줄여 그 결과 수소 원자의 확산 거리를 작게 함으로써 수소 흡수 방출 속도를 증가시킨다. 수소화물 형성 분해 싸이클링은 Mg 입자의 표면에 crack을 만들고 Mg의 입자 크기를 줄여 수소 흡수 방출 속도를 증가시킨다.

Keywords

References

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