Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Preparation of V2O5-Graphene Composites using Aerosol Process for Supercapacitors Application

에어로졸 공정을 이용한 오산화바나듐(V2O5)-그래핀 복합체 제조 및 슈퍼커패시터 응용

  • Lee, Chongmin (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)
  • 이총민 (한국지질자원연구원 자원활용연구센터) ;
  • 장희동 (한국지질자원연구원 자원활용연구센터)
  • Received : 2020.11.30
  • Accepted : 2020.12.14
  • Published : 2020.12.31
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Abstract

Vanadium Pentoxide (V2O5) has been emerged as alternative electrode materials for supercapacitors due to their low cost, natural abundance, and environmental friendliness. Graphene (GR) loaded with V2O5 can exhibit enhanced specific capacitance. In this study, we present three-dimensional (3D) crumpled graphene (CGR) decorated with V2O5. The V2O5-graphene composites were synthesized from a colloidal mixture of graphene oxide (GO) and Ammonium metavanadate (NH4VO3), via aerosol spray drying and post heat treatment process. The average size of composite was ranged from 1.82 to 4.6 ㎛. Morphology of the composite changed from a crumpled paper ball to spherical ball having relatively smooth surface as the content of V2O5 increased in the composites. The electrochemical performance of the V2O5-graphene composites was examined. The V2O5-graphene composite electrode showed the specific capacitance of 312 F/g. In addition, the device possessed acceptable cyclic stability, with 84% after 2000 cycles at 2 A/g. These outstanding properties are expected to make the composites prepared in this study as promising electrode materials for supercapacitor applications.

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References

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