Cost effective synthesis of a copper-1H-imidazole@activated carbon metal organic framework as an electrode material for supercapacitor applications

Abstract

A simple and sonochemically synthesized Cu-IC MOF exhibits good supercapacitive behaviour.

A simple conversion of expired medicines into nontoxic activated carbon for energy storage applications

“…Because, at high scan rate as well as at high current density, the short time duration does not permit the completion of chemical reactions at the inner area of the active material, and the observed capacitance was contributed only from the F I G U R E 4 (A-C) FESEM images, (D) EDX analysis, and (E, F) TEM images of Em AC outer surface area of Em AC electrode material, that is, the ion diffusions that occurred at the electrode surface, prevented the migration of ions between electrode and electrolyte. 19,24,34 Further, Table 1 indicates that Em AC electrode exhibits a comparatively higher C sp value than the previously reported works. The electrode materials with much lower resistance are essential for power device fabrication.…”

“…The N 2 adsorption-desorption isotherm curve of Em AC was given in Figure 2D, in which the sample portrayed type IV isotherm curve, with vertical uptake possessed in the low P/P o range and hysteresis loop at P/P o > 0.5, suggestive of abundant mesopores in the sample. 19,32 Figure 2D showed the corresponding pore size distribution curve, which displayed the obvious peaks between 2 and 3 nm, suggestive of mesopores in its structure. Thus, the presence of large number of mesopores opens up the channel for sufficient electrolyte penetration as well as for ion transportation.…”

“…Thus, EIS analysis of Em AC@Ni foil has proved its excellent conducting property and suitability in electrochemical device applications. 19 The cyclic stability test of the as-fabricated electrodes is the factor to determine its suitability in SC devices. In order to evaluate, the cyclic stability of Em AC@Ni foil electrode, 8000 repeated GCD cycles were recorded at 2 A/g (Figure 6B).…”

“…17,18 Thus, textural properties such as increased surface area of the electrode materials and porous nature are important factors to increase the performance of SC devices. 19,20 So far, different types of carbon materials such as graphene, graphene oxide (GO), reduced graphene oxide (rGO), and carbon nanotubes (CNT) are extensively used as electrode material in SC devices, owing to their incredible electrochemical and physical properties. [21][22][23] Multistep and laborious synthetic procedure and the high cost of materials limit their usage in energy storage devices.…”

Nanofilament array embedded tungsten oxide for highly efficient electrochromic supercapacitor electrodes

“…This is because the specific capacitance obtained by CV is calculated at a particular potential, while that obtained from the GCD is an average capacitance over the potential range. 56 From the galvanostatic charge-discharge curves, the gravimetric energy density (E) and power density (P) can be calculated from the following formulas: 57,58…”