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Fabrication of thickness controllable free-standing sandwich-structured hybrid carbon film for high-rate and high-power supercapacitor.

Wei H, Wei S, Tian W, Zhu D, Liu Y, Yuan L, Li X - Sci Rep (2014)

Bottom Line: Here we demonstrate a simple approach to fabricate free-standing sandwich-structured hybrid carbon film composed of porous amorphous carbon film and multilayer graphene film by chemical vapor deposition in a controllable and scalable way.Supercapacitors assembled by hybrid carbon films exhibit ultrahigh rate capability, wide frequency range, good capacitance performance, and high-power density.Moreover, this approach may provide a general path for fabrication of hybrid carbon materials with different structures by using different metals with high carbon solubility, and greatly expands the application scope of carbon materials.

View Article: PubMed Central - PubMed

Affiliation: School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei. 430074, PR China.

ABSTRACT
Hybrid carbon films composed of graphene film and porous carbon film may give full play to the advantages of both carbon materials, and have great potential for application in energy storage and conversion devices. Unfortunately, there are very few reports on fabrication of hybrid carbon films. Here we demonstrate a simple approach to fabricate free-standing sandwich-structured hybrid carbon film composed of porous amorphous carbon film and multilayer graphene film by chemical vapor deposition in a controllable and scalable way. Hybrid carbon films reveal good electrical conductivity, excellent flexibility, and good compatibility with substrate. Supercapacitors assembled by hybrid carbon films exhibit ultrahigh rate capability, wide frequency range, good capacitance performance, and high-power density. Moreover, this approach may provide a general path for fabrication of hybrid carbon materials with different structures by using different metals with high carbon solubility, and greatly expands the application scope of carbon materials.

No MeSH data available.


Ragone plots of HCF-based SC.(a) Areal and volumetric energy densities versus power densities of the HCF-based SCs by using carbon films with different thicknesses compared with the (MnO2–PEDOT:PSS)/AC SC, the MnO2/AC SC39, the CNC SC41, the LSG SC, the aluminum electrolytic capacitors and a lithium thin-film battery40. (b) Gravimetric energy densities versus power densities of the HCF-based SCs compared with the manganosite/GO SC44, the graphitized carbon SC45, and the hierarchical porous carbon SC46.
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f7: Ragone plots of HCF-based SC.(a) Areal and volumetric energy densities versus power densities of the HCF-based SCs by using carbon films with different thicknesses compared with the (MnO2–PEDOT:PSS)/AC SC, the MnO2/AC SC39, the CNC SC41, the LSG SC, the aluminum electrolytic capacitors and a lithium thin-film battery40. (b) Gravimetric energy densities versus power densities of the HCF-based SCs compared with the manganosite/GO SC44, the graphitized carbon SC45, and the hierarchical porous carbon SC46.

Mentions: Energy density and power density of SC are quite important parameters for their real applications. To demonstrate the overall performance of the HCF-based SC, a Ragone plot is shown in Figure 7 comparing the performance of the HCF-based SCs with different energy storage devices, including the (MnO2–PEDOT: PSS)/activated carbon (AC) SC39, the MnO2/AC SC39, the laser scribing graphene (LSG) SC40, the nano-engineered carbon film (CNC) SC41, the 3 V/30 mF aluminum electrolytic capacitor and a 500 μA h lithium thin-film battery40. The volumetric energy density of the SC based on HCF (1.12 μm) ranges from 0.08 to 0.16 mWh/cm3 (Figure 7a), which is lower than that of the MnO2/AC SC39, comparable with the CNC film SC41, higher than that of the aqueous LSG SC40, and two-orders of magnitude higher than that of the aluminum electrolytic capacitor40. Furthermore, at energy density of 0.08 mWh/cm3, the SC can deliver a maximum power density of 1.49 W/cm3, which is 10 times higher than that of the MnO2/AC SC39 and the CNC film SC41, two-orders of magnitude higher than that of the 500-μAh thin-film lithium battery, comparable with the aqueous LSG SC, and close to the lower end of the aluminum electrolytic capacitor40. These results indicate that the HCF-based SC possesses a high power density.


Fabrication of thickness controllable free-standing sandwich-structured hybrid carbon film for high-rate and high-power supercapacitor.

Wei H, Wei S, Tian W, Zhu D, Liu Y, Yuan L, Li X - Sci Rep (2014)

Ragone plots of HCF-based SC.(a) Areal and volumetric energy densities versus power densities of the HCF-based SCs by using carbon films with different thicknesses compared with the (MnO2–PEDOT:PSS)/AC SC, the MnO2/AC SC39, the CNC SC41, the LSG SC, the aluminum electrolytic capacitors and a lithium thin-film battery40. (b) Gravimetric energy densities versus power densities of the HCF-based SCs compared with the manganosite/GO SC44, the graphitized carbon SC45, and the hierarchical porous carbon SC46.
© Copyright Policy - open-access
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC4231341&req=5

f7: Ragone plots of HCF-based SC.(a) Areal and volumetric energy densities versus power densities of the HCF-based SCs by using carbon films with different thicknesses compared with the (MnO2–PEDOT:PSS)/AC SC, the MnO2/AC SC39, the CNC SC41, the LSG SC, the aluminum electrolytic capacitors and a lithium thin-film battery40. (b) Gravimetric energy densities versus power densities of the HCF-based SCs compared with the manganosite/GO SC44, the graphitized carbon SC45, and the hierarchical porous carbon SC46.
Mentions: Energy density and power density of SC are quite important parameters for their real applications. To demonstrate the overall performance of the HCF-based SC, a Ragone plot is shown in Figure 7 comparing the performance of the HCF-based SCs with different energy storage devices, including the (MnO2–PEDOT: PSS)/activated carbon (AC) SC39, the MnO2/AC SC39, the laser scribing graphene (LSG) SC40, the nano-engineered carbon film (CNC) SC41, the 3 V/30 mF aluminum electrolytic capacitor and a 500 μA h lithium thin-film battery40. The volumetric energy density of the SC based on HCF (1.12 μm) ranges from 0.08 to 0.16 mWh/cm3 (Figure 7a), which is lower than that of the MnO2/AC SC39, comparable with the CNC film SC41, higher than that of the aqueous LSG SC40, and two-orders of magnitude higher than that of the aluminum electrolytic capacitor40. Furthermore, at energy density of 0.08 mWh/cm3, the SC can deliver a maximum power density of 1.49 W/cm3, which is 10 times higher than that of the MnO2/AC SC39 and the CNC film SC41, two-orders of magnitude higher than that of the 500-μAh thin-film lithium battery, comparable with the aqueous LSG SC, and close to the lower end of the aluminum electrolytic capacitor40. These results indicate that the HCF-based SC possesses a high power density.

Bottom Line: Here we demonstrate a simple approach to fabricate free-standing sandwich-structured hybrid carbon film composed of porous amorphous carbon film and multilayer graphene film by chemical vapor deposition in a controllable and scalable way.Supercapacitors assembled by hybrid carbon films exhibit ultrahigh rate capability, wide frequency range, good capacitance performance, and high-power density.Moreover, this approach may provide a general path for fabrication of hybrid carbon materials with different structures by using different metals with high carbon solubility, and greatly expands the application scope of carbon materials.

View Article: PubMed Central - PubMed

Affiliation: School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei. 430074, PR China.

ABSTRACT
Hybrid carbon films composed of graphene film and porous carbon film may give full play to the advantages of both carbon materials, and have great potential for application in energy storage and conversion devices. Unfortunately, there are very few reports on fabrication of hybrid carbon films. Here we demonstrate a simple approach to fabricate free-standing sandwich-structured hybrid carbon film composed of porous amorphous carbon film and multilayer graphene film by chemical vapor deposition in a controllable and scalable way. Hybrid carbon films reveal good electrical conductivity, excellent flexibility, and good compatibility with substrate. Supercapacitors assembled by hybrid carbon films exhibit ultrahigh rate capability, wide frequency range, good capacitance performance, and high-power density. Moreover, this approach may provide a general path for fabrication of hybrid carbon materials with different structures by using different metals with high carbon solubility, and greatly expands the application scope of carbon materials.

No MeSH data available.