Particle and Aerosol Research
Vol. 14, No. 3, September 2018, Pages 65-72
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ISSN : 1738-8716 (Print)
ISSN : 2287-8130 (Online)
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Preparation of Core-Shell Structured Iron Oxide/Graphene Composites for Supercapacitors Application
Chongmin Lee1)2), Hankwon Chang1)2), Hee Dong Jang1),2) *
1)Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources
2)Department of Nanomaterials Science and Engineering, University of Science and Technology
*Corresponding author.
Tel.: +82-42-868-3612, E-mail: hdjang@kigam.re.kr
Received 03 August 2018, Revised 17 September 2018, Accepted 21 September 2018, Available online 30 September 2018
http://dx.doi.org/10.11629/jpaar.2018.14.3.065
Abstracts
Core-shell structured Fe3O4/graphene composites were synthesized by aerosol spray drying process from a colloidal mixture of graphene oxides and Fe3O4 nanoparticles. The structural and electrochemical performance of Fe3O4/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 Fe3O4/GR composites were synthesized in different mass ratios of Fe3O4 and graphene oxide. The composite particles were around 3 µm in size. Fe3O4 nanoparticles were encapsulated with a graphene. Morphology of the Fe3O4/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 Fe3O4/GR composite fabricated at the weight ratio of 1:4 (Fe3O4:GO) exhibited higher specific capacitance(203 F g-1) and electrical conductivity than as-fabricated Fe3O4/GR composite.
Keywords
Supercapacitors, Aerosol spray drying, Fe3O4/graphene nanocomposites, Core-shell
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