Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Fabrication of Fe3O4/Fe/Graphene nanocomposite powder by Electrical Wire Explosion in Liquid Media and its Electrochemical Properties

액중 전기선 폭발법을 이용한 Fe3O4/Fe/그래핀 나노복합체 분말의 제조 및 전기화학적 특성

  • Kim, Yoo-Young (Department of Mechanical Engineering, Gyeongnam National University of Science and Technology) ;
  • Choi, Ji-Seub (Department of Materials Engineering and Convergence Technology & RIGET, Gyeongsang National University) ;
  • Lee, Hoi-Jin (Department of Materials Engineering and Convergence Technology & RIGET, Gyeongsang National University) ;
  • Cho, Kwon-Koo (Department of Materials Engineering and Convergence Technology & RIGET, Gyeongsang National University)
  • 김유영 (경남과학기술대학교 기계공학과) ;
  • 최지습 (경상대학교 나노신소재융합공학과 & 그린에너지 융합연구소) ;
  • 이회진 (경상대학교 나노신소재융합공학과 & 그린에너지 융합연구소) ;
  • 조권구 (경상대학교 나노신소재융합공학과 & 그린에너지 융합연구소)
  • Received : 2017.07.22
  • Accepted : 2017.08.16
  • Published : 2017.08.28
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Abstract

$Fe_3O_4$/Fe/graphene nanocomposite powder is synthesized by electrical wire explosion of Fe wire and dispersed graphene in deionized water at room temperature. The structural and electrochemical characteristics of the powder are characterized by the field-emission scanning electron microscopy, X-ray diffraction, Raman spectroscopy, field-emission transmission electron microscopy, cyclic voltammetry, and galvanometric discharge-charge method. For comparison, $Fe_3O_4$/Fe nanocomposites are fabricated under the same conditions. The $Fe_3O_4$/Fe nanocomposite particles, around 15-30 nm in size, are highly encapsulated in a graphene matrix. The $Fe_3O_4$/Fe/graphene nanocomposite powder exhibits a high initial charge specific capacity of 878 mA/g and a high capacity retention of 91% (798 mA/g) after 50 cycles. The good electrochemical performance of the $Fe_3O_4$/Fe/graphene nanocomposite powder is clearly established by comparison of the results with those obtained for $Fe_3O_4$/Fe nanocomposite powder and is attributed to alleviation of volume change, good distribution of electrode active materials, and improved electrical conductivity upon the addition of graphene.

Keywords

References

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