Dimensionally engineered ternary nanocomposite of reduced graphene oxide/multiwalled carbon nanotubes/zirconium oxide for supercapacitors

Nanometer-thin ZrO2 Coating for NiO on MWCNTs as Anode for Improved Performance of Sodium-Ion Batteries

“…Similarly, Figure c shows a high-resolution spectrum of the O 1s peak in the ZrO 2 -coated NiO-MWCNT nanocomposite where four main peaks can be distinguished. The binding energies at 529.4 and 529.6 eV are attributed to the usual Ni–O bond and Ni atoms attached on the surface of MWCNTs in the form of C–O–Ni bonds, respectively. , The deconvoluted peaks at 531.22 and 532.87 eV are typical for the presence of CO and C–O types of interactions in the functionalized MWCNTs that act as catchers for metal particles. Figure d represents the characteristic peaks of Zr 3d.…”

“…These two bands along with the Raman active bands of NiO remain intact in the nanocomposite sample showing that the structure of MWCNTs and NiO is not damaged during coating, which adds to the electrochemical endurance of the nanocomposite electrode. The presence of ZrO 2 is indicated by the distinctive tiny peak between 150 and 1000 cm –1 . , …”

“…The presence of ZrO 2 is indicated by the distinctive tiny peak between 150 and 1000 cm −1 . 35,36 The band gap energies are calculated from DRS spectra (Figure 3b) by applying the Kubelka−Munk function, and the cutoff wavelength value is calculated by using a relation, E = hc/λ. The band gap of NiO-MWCNTs and ZrO 2 -coated samples is somewhat lower than that for pure NiO due to the effective association of MWCNTs.…”

“…The typical satellite features of Ni 2+ can also be observed at 860.50 and 878.80 eV. 39,40 26,36 The deconvoluted peaks at 531.22 and 532.87 eV are typical for the presence of C�O and C−O types of interactions in the functionalized MWCNTs that act as catchers for metal particles. Figure 4d represents the characteristic peaks of Zr 3d.…”

Carbon Nanomaterials Based Supercapacitors: Recent Trends

“…Orderly mesoporous fullerene/carbon hybrids were synthesized by combining the fullerene precursor in chloronaphthalene with varying quantities of sucrose CeO 2 /graphene 782 F/g 82% retention after 6000 cycles [54] nitrogen-doped carbon nano-onions (N-CNO) 205 F/ g 96% retention after 5000 cycles [55] MXene/graphene 183.5 F/ cm 3 75% retention after 3000 cycles [56] CNT@PANI 138F/g 86% retention after 1000 cycles [57] RGO/MWCNT/ZrO2 357 F/ g 98% retention after 5000 cycles [58] MnO 2 /CoWO 4 / nitrogen-doped carbon nanoonions (NCNO) 536 F/g 96% retention after 3000 cycles [59] RuO 2 quantum dots / RGO 1120 F/ g 89% retention after 10,000 cycles [60] Tetraaniline(TA)/porous RGO 85.6 F/g 104.7% after 10,000 cycles [61] Table 1. Some latest fabricated carbon-based supercapacitor electrodes.…”