Porous MgCo2O4 nanoflakes serve as electrode materials for hybrid supercapacitors with excellent performance

Engineering cationic vacancies on sphere-like zinc cobaltite microstructuresviaself-assembly of silkworm-like interconnected nanoparticles for battery-type supercapacitors

“…Battery-type materials show a distinct electrochemical response with clear redox peaks in the CV curve and a nonlinear GCD curve with a clear plateau, which differs from EDLC-based or pseudocapacitive materials. 14 CuCo 2 O 4 , 15 MgCo 2 O 4 , 16 ZnCo 2 O 4 , 17 and others are the some of the examples of battery-type SCs electrode materials.…”

Incorporation of α-MnO2 Nanoflowers into Zinc-Terephthalate Metal–Organic Frameworks for High-Performance Asymmetric Supercapacitors

“…The spin–orbit doublet peaks of Zn 2p were separated by a binding energy difference of 22.7 eV, which confirms the bivalent valence of the Zn ion. The XPS signal of O 1s of MnO 2 (Figure S1a) was split into three peaks at 530.5, 531.8, and 532.9 eV, and they were assigned to the Mn–O–Mn bond of the tetravalent metal oxide, Mn–OH bond, and to physically and chemically surface adsorbed water molecules, respectively. , The XPS signal of O 1s of ZM (Figure S1b) was split into three peaks at 529.5 eV (O–CO), 530.9 eV (Zn–O), and 532.3 eV (CO). ,, The XPS signal of O 1s of MZM (Figure S1c) was split into three peaks at 529.8 eV (O–CO/Mn–O–Mn), 530.5 eV (Zn–O/Mn–O–H), and 532.1 eV (CO), which are ascribed to the oxygen bonding with Zn and Mn metal clusters and also to the adsorbed water molecule on the surface both chemically and physically. − Further, it is obvious that all of the Zn 2p peaks (Figure b) and Mn 2p peaks (Figure c) of MZM shifted in the direction of increasing binding energies. This can be attributed to the interaction between Zn and Mn ions, moving the 2p peaks in the direction of the more positive binding energies …”

“…High-resolution XPS spectrum, CV curves, Nyquist plots, specific capacitance versus current density plot of ASC, powder XRD patterns, comparative CV curves and GCD curves, XRD pattern and FE-SEM image, CV curves of CB electrode at different scan rates (5,10,25,50, and 100 mV s −1 ), GCD curves of CB electrode at different current densities (5, 10, 15, 20,…”

Three-dimensional ternary NixCuyZnz(CO3)(OH)2 electrodes for supercapacitors: electrochemical properties and applications

“…In addition, transition metals with various oxidation numbers are advantageous for supercapacitors that charge and discharge via redox reactions. 64,65 For example, they undergo Ni 2+ /Ni 3+ , Cu 2+ /Cu 3+ , and Zn 2+ /Zn 3+ oxidation-reduction reactions. At the same time, the faradaic redox reaction widely appears with Ni-O-OH, Cu-O-OH, and Zn-O-OH in the Ni, Cu, and Zn parts, respectively.…”