Gold nanoparticles decorated rGO-ZnCo2O4 nanocomposite: A promising positive electrode for high performance hybrid supercapacitors

Effect of reaction time and PVP contents on morphologies of hierarchical 3D flower‐like ZnCo 2 O 4 microstructures for energy storage devices

“…Corresponding peaks around 1021.0/1020.8/1021.0/1020.9 eV (Z1) and 1044.1/1043.9/1044.1/1044 eV (Z2) for PVP‐L@6, PVP‐H@6, PVP‐L@12, and PVP‐H@12, respectively, were observed, indicating Zn 2+ in the normal state in ZCO samples. For all the samples, the difference in binding energies between the spin‐orbit interactions of the two transitions (Zn 2 p 3/2 and 2 p 1/2 ) was estimated to be ~23 eV, which is consistent with the results of a previous report 25,34‐36 . Similarly, a comparison of the Co 2 p core‐level spectra for all the samples is shown in Figure 6C.…”

“…For all the samples, the difference in binding energies between the spin-orbit interactions of the two transitions (Zn 2p 3/2 and 2p 1/2 ) was estimated to be $23 eV, which is consistent with the results of a previous report. 25,[34][35][36] Similarly, a comparison of the Co 2p core-level spectra for all the samples is shown in Figure 6C. The asymmetric spectra exhibited three different regions of peaks, which were related to the Co in the +2 and +3 states, along with a satellite peak.…”

Marigold flower like structured Cu2NiSnS4 electrode for high energy asymmetric solid state supercapacitors

“…5b. However, the diffusion-controlled contribution is much more stable and higher than capacity contribution even at high scan rates, suggesting high capacity of the Cu 2 NiSnS 4 -0.1 M-CA electrode originates mainly from battery behavior 46 .…”

Constructing high-performance electrode materials using core–shell ZnCo2O4@PPy nanowires for hybrid batteries and water splitting

“…The ASC delivers a maximum energy density of 141.3 W h kg À1 at a power density of 2700.5 W kg À1 , which is higher than that of the other reported devices. 21,24,[32][33][34][35] The OER performance and HER activity of the as-prepared samples were tested using a three-electrode system in a 1.0 M KOH electrolyte. Before the measurement, the electrode materials were activated 50 times through the cyclic voltammetric curves.…”

“…22,23 For example, Pail et al fabricated a rGO-ZnCo 2 O 4 nanocomposite through a hydrothermal method, which possesses a specic capacitance of 500.8 F g À1 at a current density of 1 A g À1 . 24 The Kamble group synthesized a ZnCo 2 O 4 thin lm electrode, which presents a specic capacitance of 127.8 F g À1 at a current density of 1 A g À1 and 80.6% capacity retention aer 3000 cycles. 25 Su and coworkers researched ower-like ZnCo 2 O 4 with a specic capacitance of 384 F g À1 at a current density of 1 A g À1 .…”