Synthesis and supercapacitor performance studies of N-doped graphene materials using o-phenylenediamine as the double-N precursor

Nitrogen‐Doped Carbon Membrane Derived from Polyimide as Free‐Standing Electrodes for Flexible Supercapacitors

“…The CV curves from the twoelectrode confi guration have a similar rectangle-like shape, confi rmed the EDL capacitance of Carbon PI membrane ( Figure 4 a,b). The results are different from the previous reports, [ 29,38,54 ] maybe attributing to the fact that the most of N-doping species belong to quaternary N and it is less apt to take place redox reaction, similar to graphitic structure. The area under CV curves enlarges in proportion with the increase of scan rates from 20 to 1000 mV s −1 , revealing the ideal capacitor behavior and fast charge/discharge property of Carbon PI membrane electrode.…”

Epoxy/p‐phenylenediamine functionalized graphene oxide composites and evaluation of their fracture toughness and tensile properties

“…3 Different amines have successfully functionalized graphene; these include ethylenediamine 16 and hexamethylene diamine. 17 Aromatic amines, such as p-phenylenediamine (pPDA), were attached to graphene and applied to supercapacitors, 18 dopamine detection, 19 and gas sensors. 20 pPDA is expected to prevent graphene sheets from agglomeration because of its bulky aromatic structure.…”

Electroactive biopolymer/graphene hydrogels prepared for high-performance supercapacitor electrodes

“…The specific capacitance value of Lig-GH reaches 549.5 F g -1 at the current density of 1 A g -1 , which is extraordinarily higher than that of GH electrode (244.3 F g -1 ), and also higher than those of other previously reported 3D graphene/polyaniline composites [42,45,46] and 3D graphene/polypyrrole composites [47][48][49]. The specific capacitance of as-prepared Lig-GH is also higher than those of graphene/MnO2 composites [50,51], N-doped graphene materials [52,53], porous graphene [54,55] and oxygen-containing surface-group-functionalized graphene [22,27]. The detailed comparison of specific capacitance values of Lig-GH with these materials is showed in Table S3.…”

“…As for Lig-GH, the little bit tilted result indicates its pseudocapacitance effect. The 45° inclined portion of the plots in the middle frequency is due to the Warburg resistance, which is attributed to the frequency dependence of ion diffusion/transport from electrolyte to the electrode interface [52,57,58]. In the high frequency region, Lig-GH exhibits a slightly bigger semicircle than GH, which indicates the charge transfer resistance of Lig-GH is a little higher than that of GH.…”