High-Efficiency Supercapacitor Electrodes of CVD-grown Graphenes Hybridized with Multiwalled Carbon Nanotubes
- Authors
- Kalam, Amir Abul; Park, Soobin; Seo, Yongho; Bae, Joonho
- Issue Date
- Aug-2015
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- Graphenes; Chemical vapor deposition-grown graphene; Multiwalled carbon nanotubes; Supercapacitors
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.36, no.8, pp.2111 - 2115
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 36
- Number
- 8
- Start Page
- 2111
- End Page
- 2115
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/10301
- DOI
- 10.1002/bkcs.10414
- ISSN
- 1229-5949
- Abstract
- We demonstrate, for the first time, high-efficiency supercapacitors by utilizing chemical vapor deposition (CVD)-grown graphenes hybridized with multiwalled carbon nanotubes (CNTs). A single-layer graphene was grown by simple CVD growth method, and transferred to polyethylene terephthalate substrates. The bare graphenes were further hybridized with multiwalled CNTs by drop-coating CNTs on graphenes. The supercapacitors using bare graphenes and graphenes with CNTs revealed that graphenes with CNTs resulted in enhanced supercapacitor performances of 2.2- (the mass-specific capacitance) and 4.4-fold (the area-specific capacitance) of those of bare graphenes. Our strategy to improve electrochemical performance of CVD-grown graphenes is advantageous for large-scale graphene electrodes due to high electrical conductivity of CVD-grown graphenes and cost-effectiveness of using multiwalled CNTs as compared to conventional employment of single-walled CNTs.
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