Enrichment of the field emission properties of NiCo₂O₄ nanostructures by UV/ozone treatment

Abstract

Herein, UV/O3 treatment was imposed on the hydrothermally synthesized spinel NiCo2O4 urchin like structure to study its enhancement effect in the field electron emission properties.

CrSe2/Ti3C2 MXene 2D/2D hybrids as promising candidates for energy storage applications

“…, E F = 0 eV. 61 For CrSe 2 , we have found E V = 5.66 eV and computed work function for CrSe 2 is 5.66 eV (Fig. 9b).…”

“…To compute work function, we have xed the Fermi energy of each system under consideration at zero potential energy, i.e., E F = 0 eV. 61 For CrSe 2 , we have found E V = 5.66 eV and computed work function for CrSe 2 is 5.66 eV (Fig. 9b).…”

Synthesis and Characterization of Ni–Co–O Nanosheets on Silicon Carbide Microspheres/Graphite Composite for Supercapacitor Applications

“…The XPS results confirmed the formation of more Ni 3+ and Co 3+ active species on the surface gra@SiC/Ni-Co-O compared to gra/Ni-Co-O. Figure 4e,f 3) revealed reveal that both gra/Ni-Co-O and gra@SiC/Ni-Co-O possessed abundant and accessible oxygen vacancies, indicating the existence of low coordinated metal oxygen structures, which are very helpful for enhanced supercapacitive performance [22,23]. To evaluate the capacitive performance of gra/Ni-Co-O and gra@SiC/Ni-Co-O, cyclic voltammetry (CV) and galvanostatic charges/discharge (GCD) measurements were performed from 0.0 to 0.6 V versus Ag/AgCl in 1 M KOH solution.…”

“…Indeed, the inset in Figure 3d showed the atomic ratio of Ni and Co elements in the two selected regions (Pt1 and Pt2). The Ni:Co atomic ratio at Pt1 is 1.0:2.0 higher than that of the atomic ratio at Pt2 3) revealed reveal that both gra/Ni-Co-O and gra@SiC/Ni-Co-O possessed abundant and accessible oxygen vacancies, indicating the existence of low coordinated metal oxygen structures, which are very helpful for enhanced supercapacitive performance [22,23]. 2) indicate the presence of more Co 3+ species on the gra@SiC/Ni-Co-O sample [20,21].…”

Microplotter Printing of a Miniature Flexible Supercapacitor Electrode Based on Hierarchically Organized NiCo2O4 Nanostructures

“…This may be related to the peculiarities of the material synthesis technique used in our study, resulting in a special material microstructure and affecting the material composition. For example, Pathak et al [ 62 ] have shown in their work that when the number of oxygen vacancies in NiCo 2 O 4 increases, the work function value decreases. Consequently, it is likely that in our case the material with a slightly higher content of oxygen vacancies is formed.…”