High-efficiency supercapacitor electrodes of CVD-grown graphenes hybridized with multiwalled carbon nanotubes
- 1. Dept. of Nano-physics, Gachon University, Seongnam (Korea, Republic of)
- 2. Nanotechnology and Advanced Material Engineering, HMC, and GRI, Sejong University, Seoul (Korea, Republic of)
Description
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
Additional details
Publishing Information
- Journal Title
- Bulletin of the Korean Chemical Society
- Journal Volume
- 36
- Journal Issue
- 8
- Series
- 20 refs, 5 figs
- Journal Page Range
- p. 2111-2115
- ISSN
- 0253-2964
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 48082129
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- CHEMICAL VAPOR DEPOSITION; EFFICIENCY; ELECTRIC CONDUCTIVITY; ELECTRODES; GRAPHENE; NANOTUBES; PERFORMANCE
- Descriptors DEC
- CARBON; CHEMICAL COATING; DEPOSITION; ELECTRICAL PROPERTIES; ELEMENTS; NANOSTRUCTURES; NONMETALS; PHYSICAL PROPERTIES; SURFACE COATING