Structure design of NiCo₂O₄ electrodes for high performance pseudocapacitors and lithium-ion batteries

Abstract

An ultralight nickel scaffold is designed to enhance the electrochemical performance of NiCo2O4 nanowire electrodes.

Hierarchical NiCoO2 Nanosheets Anchored on Hollow Carbon Spheres for High‐Performance Lithium‐Ion Battery Anodes

“…[42] Simultaneously,t he main reductionp eaks are shifted to higherp otentials at 0.79 V and 1.67 V, suggesting the existence of ap ossible activation process initially and the inactivation of the NiCoO 2 duringt he first cycle. [43][44][45] During the next anodic loops, two peaks appear at 1.57 Vand 2.35 V, which representst he oxidation of metallicN ia nd Co to NiO and CoO. [46,47] The electrode reactions can be explained by Equations (1)-(3), which correspond to the cyclic voltammetry resultsa nd as imilar reaction reported previously.…”

Interconnected hierarchical NiCo2O4 microspheres as high-performance electrode materials for supercapacitors

“…[15][16][17][18] Moreover, owing to the co-existence of two different metal cations in a single crystal structure, NiCo 2 O 4 can synergistically enhance the electrochemical performance as compared to the corresponding nickel oxides and cobalt oxides. 15,[19][20][21][22] For example, An et al demonstrated that the porous NiCo 2 O 4 nanowires exhibited higher capacitance than Co 3 O 4 with a similar structure. 19 More recently, Hu et al also reported that Co 3 O 4 / NiCo 2 O 4 double-shelled nanocages showed improved pseudocapacitance than the single-component Co 3 O 4 /Co 3 O 4 doubleshelled nanocages.…”

“…Considering the similar structural requirements of electrode materials for Li-ion-based batteries and supercapacitors, the structure with excellent performance for one can be applied in the other one. For example, yolk-shelled Ni-Co mixed oxide nanoprisms, 15 NiCo 2 O 4 complex hollow spheres, 31 Mn-based mixed metal oxide hierarchical tubular structures, 20 and UNF@NiCo 2 O 4 composites 22 have been demonstrated to possess excellent performance in both fields. Thus, a material with large tunnels and mesopores, which has been proved to exhibit high performance for Li-O 2 batteries, 33 is a promising alternative electrode material for supercapacitors.…”

Novel Co2VO4 Anodes Using Ultralight 3D Metallic Current Collector and Carbon Sandwiched Structures for High‐Performance Li‐Ion Batteries

“…In the conventional Li‐ion anodes, copper foil (≈10 µm thick) is universally employed to support a composite layer consisting of active materials, binders, and conductive agents . This laminate structure receives tremendous success for the intercalation materials because their volume changes are usually small and manageable by the calendared Cu foil and active material composite.…”