Hierarchical core-shell polypyrrole@NiCo layered double hydroxide arrays grown on stainless steel yarn with high flexibility for 1D symmetric yarn-shaped supercapacitors

Heterostructure CuO/Co3O4 Nanocomposite: An Efficient Electrode for Supercapacitor and Electrocatalyst for Oxygen Evolution Reaction Applications

“…It is identified that the increase in the potential window to 1.2 V showed a similar shape to the CV curves, which confirms the stability of the electrode material. Figure (a) shows the CV curves of SC at various scan rates in the potential range of 0 to 1.2 V. It is identified that the increase in the scan rate also increases the area under the peak and no deviation was observed even at a higher scan rate confirmed the high electrochemical stability of the material. − The GCD curve of SC at a current density of 10 A g –1 at the various potential windows (Figure S5b) displayed the symmetric behavior of the GCD curves, further confirming the electrochemical stability of the material. Figure (b) shows the GCD curves of SC at various current densities between 0 to 1.2 V potential ranges.…”

Optimized Fabrication of Bimetallic ZnCo Metal–Organic Framework at NiCo-Layered Double Hydroxides for Multiple Storage and Capability Synergy All-Solid-State Supercapacitors

“…Interestingly, the ZnCo-MOF@NiCo-LDH electrode demonstrated a superior capacitive performance by displaying C s of 1611 and 1065 F g –1 at current densities of 2 and 20 A g –1 , respectively, without sacrificing the rate capability (66%). The acquired results for our hybrid electrode are significantly superior to the previously reported NiCo-LDH-based electrode materials, such as the hydrothermally synthesized core-shell polypyrrole@NiCo-LDH (1050 F g –1 at 2 A g –1 ), the MOF derived NiCo-LDH nanotubes (1386 F g –1 at 1 A g –1 ), the solvothermally grown Ni 0.5 Co 0.5 -LDH nanosheets on activated carbon derived from biomass (921 F g –1 at 2 A g –1 ), and the hybrid NiCo-LDH/Multilayer graphene (1212.75 F g –1 at 1 A g –1 ) . A comparison between the results presented by our hybrid electrode and those previously reported in the literature for other NiCo-LDH-based composites is summarized in Table .…”

“…The peaks at binding energies of 856.26 and 858.89 eV are indexed to Ni 3+ and Ni 2+ oxidation states of the Ni 2p 3/2 , respectively, while the peaks of the Ni 2p 1/2 are situated at binding energies of 873.28 and 875.13 eV, assigned to Ni 3+ and Ni 2+ valences, respectively. 47,48 In addition, two shake-up satellite peaks at 862.78 and 867.15 eV can be ascribed to the Ni 2p 3/2 peak, whereas the Ni 2p 1/2 revealed one satellite peak at 879.38 eV. As for the HR-XPS spectrum of the Zn 2p (Figure 3c), two sharp spin-orbit peaks located at binding energies of 1021.98 and 1044.93 eV are indexed to Zn 2p 3/2 and Zn 2p 1/2 of the Zn 2+ , respectively.…”

Rapid synthesis of MnS/NiCo-LDH heterostructures for high-performance supercapacitors

“…18,19 Especially, since NiCo-LDH has a phenomenal logical C m (>3000 F g −1 ), it has drawn much attention. 20 Wang's team 21 fabricated PPy@NiCo-LDH electrodes through hydrothermal and electrochemical deposition processes and achieved a specific capacitance of 1196 F g −1 at 1 A g −1 . However, the use of NiCo-LDH is constrained by its awful cycle life and poor conductive rate performance.…”