Systematic study on structural and electronic properties of diamine/triamine functionalized graphene networks for supercapacitor application

Dissected carbon nanotubes functionalized by 1-hydroxyanthraquinone for high-performance asymmetric supercapacitors

“…The C]O stretching of COOH groups is observed at 1717 cm À1 while the other oxygen-containing functional groups are revealed by the bands at 1385 and 1084 cm À1 , which correspond to C-O in phenol and primary alcohol, respectively. 38,39 The characteristic peaks of HAQ-rDCNTs are observed at 1628, 1223 and 710 cm À1 , which are consistent with the adsorptions of pure HAQ, strongly con-rming the presence of HAQ onto rDCNTs. The peak revealed at 1628 cm À1 is attributed to the C]O stretching vibrations of HAQ, while the peaks at 1223 and 710 cm À1 correspond to the aromatic skeleton stretching vibration and C-H out-of-plane deformation vibration, respectively.…”

“…X-ray photoelectron spectroscopy (XPS) is an effective method to analyze the elemental composition and chemical state of carbonaceous materials. 38,45 The whole patterns as shown in Fig. 5a, two principal peaks are demonstrated in the spectra of DCNTs and HAQ-rDCNTs, which can be explained by a C 1s peak located at 284.3 eV and an O 1s peak at around 531.0 eV.…”

“…35 Compared with pristine MWCNTs, the (002) peak of DCNTs near 21.7 (interlayer spacing ¼ 3.8Å) shows an obviously le shi and becomes widen due to the increase of basal spacing. 37,38 This result suggests that aer cutting and unzipping, there are a certain amount of intercalated water molecules bonded to oxygen-containing functional groups on the ribbonlike graphene oxide layers by hydrogen bonds. For HAQ-rDCNTs, the spectra remain the essential feature of the XRD pattern of DCNTs, which indicated that the organic compounds are anchored in the form of molecule.…”

Nitrogen and sulfur co-doped graphene aerogel for high performance supercapacitors

“…In addition, Table 1 shows that the energy density value of the supercapacitor is more than those of the graphene-based supercapacitors reported previously. 19,[26][27][28]…”

Fabrication and Engineering of Nanostructured Supercapacitor Electrodes Using Electromagnetic Field‐Based Techniques

“…Recently, with the development of nanotechnology, many novel materials which had not been considered before have been studied and used as electrode materials. With both opportunity and challenge, special techniques such as laser‐assisted techniques, high energy ray‐ and particle‐based techniques, must be utilized to fulfill their great potential especially in the fields of artificial intelligences, biomedical sensors, and radiofrequency identifications . The rising of these techniques will inevitably benefit the development of portable and wearable electronics and elevate the performance characteristics of novel module functionalities.…”