Synthesis of functionalized 3D hierarchical porous carbon for high-performance supercapacitors

N-doped microporous carbon microspheres for high volumetric performance supercapacitors

“…This behavior is in accordance with its low electronic conductivity and resistance to ion transport within the porous structure as was confirmed in the EIS measurements (see Figure 4c). The rate capability of the activated microspheres compares well with that of advanced porous carbons, including hierarchical porous carbons [55][56][57][58]. The stability of these materials in organic electrolyte was evaluated by charge-discharge and N-CSA-700 at their maximum working voltage window in volumetric units.…”

Hyperporous Carbons from Hypercrosslinked Polymers

“…Nitrogen sorption isotherms for the HCPs, Ben750, Th850, and Py800, are shown in Figure 1b. The physical properties of these Porous carbonaceous materials have been of interest for many years because of applications [1] such as gas separation, [2] water purification, [3] catalysis, [4] electromagnetic interface shielding, [5] and energy storage in batteries, [6] supercapacitors, [7] and fuel cells. [8] Porous carbons are appealing because of their relatively low cost and their ease of preparation from a variety of natural and synthetic precursors.…”

Asymmetric supercapacitor based on nanostructured graphene foam/polyvinyl alcohol/formaldehyde and activated carbon electrodes

“…To enhance the conductivity of the hydrogel, 0.5 ml of a conducting polymer; polypyrole (PPY) was also added to the solution which also serve as additional carbon source for the composite hydrogel. In addition to this, PPY was chosen because it has been shown to have a unique pentagonal ring structure with heteroatoms such as nitrogen which might induce a doping effect on the hydrogel during the carbonization process; hence improving on the conductivity, wettability of the produced porous carbon and also maximization of the electro-active surface area for improved electrochemical performance of the composite material [30,31]. After the addition of PPY, the solution was stirred for 30 minutes to obtain a homogeneous dispersion and the resulting solution was transferred into microwave reactor chamber operated at 180 o C for 6 hours.…”