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Highly Conductive Aromatic Functionalized Multi-Walled Carbon Nanotube for Inkjet Printable High Performance Supercapacitor Electrodes.

Ujjain SK, Bhatia R, Ahuja P, Attri P - PLoS ONE (2015)

Bottom Line: Carboxylic moieties (-COOH) on aromatic azide result in highly stable aqueous dispersion (max. conc. ~ 10 mg/mL H2O), making the suitable for inkjet printing.Fabricated Supercapacitors (SC) assembled using these printed substrates exhibit good electrochemical performance in organic as well as aqueous electrolytes.Capacitive retention varies from ~85-94% with columbic efficiency ~95% after 1000 charge/discharge cycles in different electrolytes, demonstrating the excellent potential of the device for futuristic power applications.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, Indian Institute of Technology Kanpur, Kanpur, UP, India.

ABSTRACT
We report the functionalization of multiwalled carbon nanotubes (MWCNT) via the 1,3-dipolar [3+2] cycloaddition of aromatic azides, which resulted in a detangled CNT as shown by transmission electron microscopy (TEM). Carboxylic moieties (-COOH) on aromatic azide result in highly stable aqueous dispersion (max. conc. ~ 10 mg/mL H2O), making the suitable for inkjet printing. Printed patterns on polyethylene terephthalate (PET) flexible substrate exhibit low sheet resistivity ~65 Ω. cm, which is attributed to enhanced conductivity. Fabricated Supercapacitors (SC) assembled using these printed substrates exhibit good electrochemical performance in organic as well as aqueous electrolytes. High energy and power density (57.8 Wh/kg and 0.85 kW/kg) in 1M H2SO4 aqueous electrolyte demonstrate the excellent performance of the proposed supercapacitor. Capacitive retention varies from ~85-94% with columbic efficiency ~95% after 1000 charge/discharge cycles in different electrolytes, demonstrating the excellent potential of the device for futuristic power applications.

No MeSH data available.


(a) Strips of printed f-MWCNT on PET, (b) SEM micrographs of 1 printed layer, (c) 2 printed layers and (d) 5 printed layers.Inset figure shows decrement in resistivity with number of printed layers.
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pone.0131475.g005: (a) Strips of printed f-MWCNT on PET, (b) SEM micrographs of 1 printed layer, (c) 2 printed layers and (d) 5 printed layers.Inset figure shows decrement in resistivity with number of printed layers.

Mentions: The surface morphology of the inkjet printed films with different printed layers is studied using SEM (Fig 5). It is observed that for single print, CNT are approximately monodispersed on the PET substrate with an average thickness of 35 nm (Fig 5a). However, this monolayer CNTs film exhibits a poor conducting network with resistivity of 11.2 kΩ cm. On increasing the printed layers, the print dots occupy the vacancies or overlap with each other, resulting in the gradual formation of a continuous CNT network with decreased electrical resistance of the CNT film (Fig 5b and 5c). When CNTs are printed for five layers (Fig 5d), the network is dense and covers almost all voids on the film. They form tangled, randomly oriented, and highly conducting networks (thickness ~ 0.2 μm) with a sheet resistivity 65 Ω. cm. The resistivity versus printed layers of f-MWCNT is shown in the inset in Fig 5d. As expected, the resistance of the films decreased with the number of print repetitions due to the better percolation between the deposited CNT which can arise due to the presence of the N hetero atom in the cycloaddition of azides MWCNT. These f-MWCNT films were used as electrodes for fabricating the supercapacitor and their electrochemical performances were evaluated using CV, EIS, and GCD in neutral, acidic, basic, and organic electrolytes.


Highly Conductive Aromatic Functionalized Multi-Walled Carbon Nanotube for Inkjet Printable High Performance Supercapacitor Electrodes.

Ujjain SK, Bhatia R, Ahuja P, Attri P - PLoS ONE (2015)

(a) Strips of printed f-MWCNT on PET, (b) SEM micrographs of 1 printed layer, (c) 2 printed layers and (d) 5 printed layers.Inset figure shows decrement in resistivity with number of printed layers.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4496069&req=5

pone.0131475.g005: (a) Strips of printed f-MWCNT on PET, (b) SEM micrographs of 1 printed layer, (c) 2 printed layers and (d) 5 printed layers.Inset figure shows decrement in resistivity with number of printed layers.
Mentions: The surface morphology of the inkjet printed films with different printed layers is studied using SEM (Fig 5). It is observed that for single print, CNT are approximately monodispersed on the PET substrate with an average thickness of 35 nm (Fig 5a). However, this monolayer CNTs film exhibits a poor conducting network with resistivity of 11.2 kΩ cm. On increasing the printed layers, the print dots occupy the vacancies or overlap with each other, resulting in the gradual formation of a continuous CNT network with decreased electrical resistance of the CNT film (Fig 5b and 5c). When CNTs are printed for five layers (Fig 5d), the network is dense and covers almost all voids on the film. They form tangled, randomly oriented, and highly conducting networks (thickness ~ 0.2 μm) with a sheet resistivity 65 Ω. cm. The resistivity versus printed layers of f-MWCNT is shown in the inset in Fig 5d. As expected, the resistance of the films decreased with the number of print repetitions due to the better percolation between the deposited CNT which can arise due to the presence of the N hetero atom in the cycloaddition of azides MWCNT. These f-MWCNT films were used as electrodes for fabricating the supercapacitor and their electrochemical performances were evaluated using CV, EIS, and GCD in neutral, acidic, basic, and organic electrolytes.

Bottom Line: Carboxylic moieties (-COOH) on aromatic azide result in highly stable aqueous dispersion (max. conc. ~ 10 mg/mL H2O), making the suitable for inkjet printing.Fabricated Supercapacitors (SC) assembled using these printed substrates exhibit good electrochemical performance in organic as well as aqueous electrolytes.Capacitive retention varies from ~85-94% with columbic efficiency ~95% after 1000 charge/discharge cycles in different electrolytes, demonstrating the excellent potential of the device for futuristic power applications.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, Indian Institute of Technology Kanpur, Kanpur, UP, India.

ABSTRACT
We report the functionalization of multiwalled carbon nanotubes (MWCNT) via the 1,3-dipolar [3+2] cycloaddition of aromatic azides, which resulted in a detangled CNT as shown by transmission electron microscopy (TEM). Carboxylic moieties (-COOH) on aromatic azide result in highly stable aqueous dispersion (max. conc. ~ 10 mg/mL H2O), making the suitable for inkjet printing. Printed patterns on polyethylene terephthalate (PET) flexible substrate exhibit low sheet resistivity ~65 Ω. cm, which is attributed to enhanced conductivity. Fabricated Supercapacitors (SC) assembled using these printed substrates exhibit good electrochemical performance in organic as well as aqueous electrolytes. High energy and power density (57.8 Wh/kg and 0.85 kW/kg) in 1M H2SO4 aqueous electrolyte demonstrate the excellent performance of the proposed supercapacitor. Capacitive retention varies from ~85-94% with columbic efficiency ~95% after 1000 charge/discharge cycles in different electrolytes, demonstrating the excellent potential of the device for futuristic power applications.

No MeSH data available.