Fig 1.
Functionalization of MWCNT with aryl azide.
Fig 2.
(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.
Fig 3.
(a) Raman spectra, (b) FTIR spectra, (c) UV-Vis spectra, and (d) Thermogravimetric curves of MWCNT and f-MWCNT.
Fig 4.
Photographic image of f-MWCNT dispersion in chloroform, ethanol, DMF, DMSO, and H2O (a) before 1 month and (b) after 1 month.
Fig 5.
(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.
Fig 6.
Scan rate dependent Cyclic Voltammograms (CVs) for f-MWCNT SCs in different electrolytes.
Fig 7.
(a) Nyquist plots for f-MWCNT SC in different electrolytes. Inset shows equivalent circuit for SC and Rs/RCT values presented in tabular form. (b) Bode plots of f-MWCNT SCs in different electrolytes.
Fig 8.
Galvanostatic charge-discharge (GCD) curves of f-MWCNT SCs at different current densities in (a) 0.1 M ACN + TBAP, (b) 1 M Na2SO4, (c) 1 M H2SO4, and (d) 1 M KOH.
Insets show variation of IR drops at different current densities.
Fig 9.
(a) Charge/discharge cycling life test and Columbic efficiency. (b) Ragone plot for f-MWCNT SCs in all electrolytes.
Table 1.
Specific capacitance, energy and power density calculated from CV and GCD curves respectively in different electrolytes.