Interfacial synthesis of micro-cuboid Ni_0.55Co_0.45C₂O₄ solid solution with enhanced electrochemical performance for hybrid supercapacitors

Abstract

The rare crystal nucleus for the growth of Ni0.55Co0.45C2O4 solid solution during a biphasic interfacial reaction contribute to the formation of the hierarchical micro-cuboid structure with excellent electrochemical performance.

Nickel–cobalt oxalate as an efficient non-precious electrocatalyst for an improved alkaline oxygen evolution reaction

“…As-shown in Fig. 1a 31 Thermal stability of as-prepared sample was corroborated by DTA-TG analysis. Fig.…”

Redox Tuning in Crystalline and Electronic Structure of Bimetal–Organic Frameworks Derived Cobalt/Nickel Boride/Sulfide for Boosted Faradaic Capacitance

“…The designed device can deliver an energy density of 45.0 Wh kg −1 at the power density of 857.7 W kg −1 . Even after the power density increased to 13.6 KW kg −1 , the device still demonstrates an energy density of 36.8 Wh kg −1 , outperforming most of the excellent energy storage devices (Figure e), such as nickel‐cobalt phosphate//AC, NiNTAS@Fe 2 O 3 //NiNTAS@MnO 2 , Ni 0.55 Co 0.45 C 2 O 4 //AC, Ni‐Co LDH@NF//NiCoO 2 @NF, CoNi‐MOF//AC, and CC@NiCo 2 Al‐LDH//CC@ZPC . Moreover, the asymmetric device shows excellent cycling stability with retention of 87.7% at a current density of 12 A g −1 after 5000 cycles (Figure f), suggesting the robust interconnected networks and reasonable strain accommodation of the hybrid electrode.…”

Understanding the High‐Performance Anode Material of CoC2O4⋅2 H2O Microrods Wrapped by Reduced Graphene Oxide for Lithium‐Ion and Sodium‐Ion Batteries

“…The O 1s spectrum indicates the presence of C=O (at 531.5 eV) and the other peak of H 2 O (at 533.1 eV), [25] as shown in Figure 2 e. The Co 2p spectrum contains two strong peaks at 783.1 and 797.9 eV (Figure 2 f), which are related to the Co 2p 3/2 and Co 2p 1/2 binding energies, respectively [24a, 26] . These two peaks verify the existence of the Co 2+ state in the hybrids.…”