Chongmin Lee1,2, Hankwon Chang1,2, Hee Dong Jang 1,2


Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources, Yuseong-gu, Daejeon 34132, Korea
Department of Nanomaterials Science and Engineering, University of Science and Technology, Yuseong-gu, Daejeon 34113, Korea



Received: October 17, 2018
Revised: October 17, 2018
Accepted: November 19, 2018
Download Citation: ||https://doi.org/10.4209/aaqr.2018.10.0372  

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Cite this article:
Lee, C., Chang, H. and Jang, H.D. (2019). Preparation of CoFe2O4-Graphene Composites Using Aerosol Spray Pyrolysis for Supercapacitors Application. Aerosol Air Qual. Res. 19: 443-448. https://doi.org/10.4209/aaqr.2018.10.0372


HIGHLIGHTS

  • The CoFe2O4-graphene composites were synthesized by aerosol spray pyrolysis.
  • The composites showed crumpled paper ball like morphology.
  • The composites showed enhanced specific capacitance and rate capability.

ABSTRACT


Cobalt-iron oxides have attracted much attention as electrode materials for supercapacitors. Graphene loaded with cobalt ferrite (CoFe2O4) nanoparticles can exhibit enhanced specific capacitance. Here, we present three-dimensional (3D) crumpled graphene (CGR) loaded with CoFe2O4 nanoparticles. The CoFe2O4-graphene composites were synthesized from a colloidal mixture of GO, FeCl3⋅6H2O, and CoCl2⋅6H2O by one step aerosol spray pyrolysis. The CoFe2O4-GR composites displayed a morphology resembling a crumpled paper ball, and the size of the CoFe2O4 and CGR in the composites was around 5 nm and 500 nm, respectively. The highest specific capacitance of the CoFe2O4-graphene composites was 253 F g–1.


Keywords: Aerosol spray pyrolysis; CoFe2O4; Nanoparticles; Graphene; Supercapacitors.

 


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