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http://dx.doi.org/10.11629/jpaar.2018.14.3.065

Preparation of Core-Shell Structured Iron Oxide/Graphene Composites for Supercapacitors Application  

Lee, Chongmin (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources)
Chang, Hankwon (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources)
Jang, Hee Dong (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Particle and aerosol research / v.14, no.3, 2018 , pp. 65-72 More about this Journal
Abstract
Core-shell structured $Fe_3O_4/graphene$ composites were synthesized by aerosol spray drying process from a colloidal mixture of graphene oxides and $Fe_3O_4$ nanoparticles. The structural and electrochemical performance of $Fe_3O_4/graphene$ were characterized by the field-emission scanning electron microscopy, X-ray diffraction, Raman spectroscopy, cyclic voltammetry, and galvanometric discharge-charge method. Core-shell structured $Fe_3O_4/GR$ composites were synthesized in different mass ratios of $Fe_3O_4$ and graphene oxide. The composite particles were around $3{\mu}m$ in size. $Fe_3O_4$ nanoparticles were encapsulated with a graphene. Morphology of the $Fe_3O_4/graphene$ composite particles changed from a spherical ball having a relatively smooth surface to a porous crumpled paper ball as the content of GO increased in the composites. The $Fe_3O_4/GR$ composite fabricated at the weight ratio of 1:4 ($Fe_3O_4:GO$) exhibited higher specific capacitance($203F\;g^{-1}$) and electrical conductivity than as-fabricated $Fe_3O_4/GR$ composite.
Keywords
Supercapacitors; Aerosol spray drying; $Fe_3O_4/graphene$ nanocomposites; Core-shell;
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