High performance asymmetric supercapacitor based on hydrothermally synthesized ZnO nanosheets embedded on Ni foam

Synthesis and Electrochemical Characterization of ZnMoS4 Nanorods on Nickel Foam Substrate for Advanced Hybrid Supercapacitor Applications

“…Peaks corresponding to O and C, visible in Figure a, may arise from O 2 , H 2 O, or CO 2 adsorbed on the surface, or from adventitious hydrocarbons originating from the XPS instrument. Figure b features the Zn 2p peak with binding energy peaks at 1045.5 eV, and 1022.7 eV, attributed to the Zn 2p 1/2 and Zn 2p 3/2 peaks of Zn 2+ , respectively . In Figure c, the Mo 3d XP spectrum reveals two peaks at about 232.15 and 235.25 eV, corresponding to Mo 3d 5/2 and Mo 3d 3/2 , respectively …”

“…Figure 6b features the Zn 2p peak with binding energy peaks at 1045.5 eV, and 1022.7 eV, attributed to the Zn 2p 1/2 and Zn 2p 3/2 peaks of Zn 2+ , respectively. 40 In Figure 6c, the Mo 3d XP spectrum reveals two peaks at about 232.15 and 235.25 eV, corresponding to Mo 3d 5/2 and Mo 3d 3/2 , respectively. 41 Figure 6d shows the S 2p XP spectrum with binding energies at 163.6 and 162.1 eV designated for S 2p 1/2 and S 2p 3/2 , respectively.…”

Redox electrolyte mediated performance enhancement in aqueous zinc ion hybrid supercapacitors composed of spinel BaFe2O4 and cubic Cu2O

“…Owing to water hydrolysis having a restriction over the voltage window of aqueous electrolytes, when SSC can reach up to 1.0 volts, ACS can work a maximum between 0 and 1.8 volts in an aqueous electrolyte. [11][12][13][14][15][16][17][18][19][20][21] Therefore, low energy density (ED) due to restrained potential range limits the utilization of SCs in practical applications.…”

Enhancing the Electrochemical Performance of ZnO-Co3O4 and Zn-Co-O Supercapacitor Electrodes Due to the In Situ Electrochemical Etching Process and the Formation of Co3O4 Nanoparticles

“…The heterostructure showed a specific capacitance of 2305 F g −1 at a voltage rate of 2 mV s −1 and 1235 F g −1 at a current density of 5 A g −1 . The specific capacitance of asymmetric supercapacitors using ZnO nanosheets on Ni foam (ZnO@NF) as the positive electrode and activated carbon (AC) on Ni foam (AC@NF) as the negative electrode reaches up to 87 F g −1 at 1 A g −1 and the supercapacitors exhibit an energy density of 28 W h kg −1 and a power density of 839 W kg −1 [72]. Considering all these extensive works on the utilization of ZnO as an electrode material for supercapacitor applications shows that using ZnO-based materials as electrode materials for supercapacitors is currently attracting significant and sustained interest.…”