Journal of Ceramic Processing Research

  • 제20권6호
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  • Pages.609-616
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  • 2019
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  • 1229-9162(pISSN)
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  • 2672-152X(eISSN)
한양대학교 세라믹연구소 (Ceramic Processing Research Center)
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Y2O3-stabilized ZrO2, Ni, and graphene-added Mg by reactive mechanical grinding processing for hydrogen storage and comparison with Ni and Fe2O3 or MnO-added Mg

  • Song, Myoung Youp (Division of Advanced Materials Engineering, Hydrogen & Fuel Cell Research Center, Engineering Research Institute, Jeonbuk National University) ;
  • Choi, Eunho (Department of Materials Engineering, Graduate School, Jeonbuk National University) ;
  • Kwak, Young Jun (Division of Advanced Materials Engineering, Hydrogen & Fuel Cell Research Center, Engineering Research Institute, Jeonbuk National University)
  • 투고 : 2019.08.05
  • 심사 : 2019.10.07
  • 발행 : 2019.12.01
⟨ 이전 논문 다음 논문 ⟩

초록

The optimum powder to ball ratio was examined, which is one of the important conditions in reactive mechanical grinding processing. Yttria (Y2O3)-stabilized zirconia (ZrO2) (YSZ), Ni, and graphene were chosen as additives to enhance the hydriding and dehydriding rates of Mg. Samples with a composition of 92.5 wt% Mg + 2.5 wt% YSZ + 2.5 wt% Ni + 2.5 wt% graphene (designated as Mg-2.5YSZ-2.5Ni-2.5graphene) were prepared by grinding in hydrogen atmosphere. Mg-2.5YSZ-2.5Ni-2.5graphene had a high effective hydrogen-storage capacity of almost 7 wt% (6.85 wt%) at 623 K in 12 bar H2 at the second cycle (n = 2). Mg-2.5YSZ-2.5Ni-2.5graphene contained Mg2Ni phase after hydriding-dehydriding cycling. Mg-2.5YSZ-2.5Ni-2.5graphene had a larger quantity of hydrogen absorbed for 60 min, Ha (60 min), than Mg-2.5Ni-2.5graphene and Mg-2.5graphene. The addition of YSZ also increased the initial dehydriding rate and the quantity of hydrogen released for 60 min, Hd (60 min), compared with those of Mg-2.5Ni-2.5graphene. Y2O3-stabilized ZrO2, Ni, and graphene-added Mg had a higher initial hydriding rate and a larger Ha (60 min) than Fe2O3, MnO, or Ni and Fe2O3-added Mg at n = 1.

키워드

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