N-doped carbon layer coated thermally exfoliated graphene and its capacitive behavior in redox active electrolyte

Graphene coated with controllable N-doped carbon layer by molecular layer deposition as electrode materials for supercapacitors

“…In this work, pristine graphene was used as starting material and no chemical activation process was employed, which results in relatively low specific surface area. In comparison with literature, the specific capacitance of NC-G achieved herein is similar to that of the chemical N-doped graphene with similar specific surface area, pore structure and nitrogen content [32,51,52].…”

“…Polyimide [25], polyvinylpyridine [26], polyacrylonitriles [27], polyaniline [28] et al) or biomass derivatives [29e31] to keep nitrogen atom being homogenously dispersed in the basal plane of carbon matrix. Considering the low conductively of N-doped carbons fabricated by this way, broad attention have been paid to combining them with graphene [14,32] or CNTs [33]. Such combination can develop their respective advantages, thus achieving high specific capacitance as well as excellent rate capacity.…”

Uniformly Dispersed ZnFe2O4 Nanoparticles on Nitrogen-Modified Graphene for High-Performance Supercapacitor as Electrode

“…As shown in Fig. 5d , the N 1 s spectrum of the ZnFe 2 O 4 /NRG can be divided into three types centered at 398.7, 399.9, and 401.1 eV, assigned to Pyridinic-N, Pyrrolic-N and Graphitic-N, which can demonstrate the successful doping of nitrogen into graphene network 59 . It has been proved that pyridinic N and pyrrolic N can create large number of defects on the surface of graphene, providing more diffusion channels and active sites for the fast transportation of ions 60 61 .…”

“…Surface area and pore size play important roles in determining the electrochemical properties of electrode materials 55 59 . Therefore, N 2 adsorption/desorption were performed to study the specific surface area and porous nature of ZnFe 2 O 4 /NRG composites.…”

Porous nitrogen-doped graphene/carbon nanotubes composite with an enhanced supercapacitor performance

“…Meanwhile, compared with arcs of rGO at high frequency, those of GC, NGC and PNGC are inconspicuous, because of their low electronic resistance [50]. The above results display that nitrogen doping and pores formation effectively decrease the resistance of the material, in which pores provide more channels for diffusion and nitrogen doping create more active sites to improve conductivity [51].…”