Limits...
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) TEM of f-MWCNTs; inset shows magnified image with change in morphology of MWCNT on functionalization and (b) HRTEM with fringe width 0.34 nm.Arrow heads demonstrate presence of adduct.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4496069&req=5

pone.0131475.g002: (a) TEM of f-MWCNTs; inset shows magnified image with change in morphology of MWCNT on functionalization and (b) HRTEM with fringe width 0.34 nm.Arrow heads demonstrate presence of adduct.

Mentions: Fig 1 shows the schematic pathway for modification of MWCNT. It shows that the 1,3-dipolar [3+2] cycloaddition of azides to MWCNT sidewalls followed by thermal extrusion of N2 from the triazoline intermediate resulted in aziridino functionalized MWCNT (f-MWCNT). This approach of covalent functionalization is particularly important, as cycloaddition carried out according to the described conditions does not become physically damage or break the CNT structure, thus retaining its high conductivity [24]. The efficient functionalization of MWCNT was observed using TEM (Fig 2a), showing highly dispersed CNT. After functionalization, the strong van der Waal forces of attraction between the tubes were disturbed, resulting in the breaking of super bundles and consequent enhanced solubility in common organic solvents. The inset figure demonstrates the change in morphology of the carbon nanotubes after functionalization, shown with the yellow arrow, resulting from the high degree of functionalization. The HRTEM image (Fig 2b) shows clear fringes with a d spacing of 0.34 nm and the diameter of f-MWCNT is found to be ~30 nm. To identify the features that change through azide functionalization on MWCNT, the pristine MWCNT and f-MWCNT samples are further studied using Raman spectroscopy.


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) TEM of f-MWCNTs; inset shows magnified image with change in morphology of MWCNT on functionalization and (b) HRTEM with fringe width 0.34 nm.Arrow heads demonstrate presence of adduct.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0131475.g002: (a) TEM of f-MWCNTs; inset shows magnified image with change in morphology of MWCNT on functionalization and (b) HRTEM with fringe width 0.34 nm.Arrow heads demonstrate presence of adduct.
Mentions: Fig 1 shows the schematic pathway for modification of MWCNT. It shows that the 1,3-dipolar [3+2] cycloaddition of azides to MWCNT sidewalls followed by thermal extrusion of N2 from the triazoline intermediate resulted in aziridino functionalized MWCNT (f-MWCNT). This approach of covalent functionalization is particularly important, as cycloaddition carried out according to the described conditions does not become physically damage or break the CNT structure, thus retaining its high conductivity [24]. The efficient functionalization of MWCNT was observed using TEM (Fig 2a), showing highly dispersed CNT. After functionalization, the strong van der Waal forces of attraction between the tubes were disturbed, resulting in the breaking of super bundles and consequent enhanced solubility in common organic solvents. The inset figure demonstrates the change in morphology of the carbon nanotubes after functionalization, shown with the yellow arrow, resulting from the high degree of functionalization. The HRTEM image (Fig 2b) shows clear fringes with a d spacing of 0.34 nm and the diameter of f-MWCNT is found to be ~30 nm. To identify the features that change through azide functionalization on MWCNT, the pristine MWCNT and f-MWCNT samples are further studied using Raman spectroscopy.

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.