Delicate control of crystallographic Cu₂O derived Ni–Co amorphous double hydroxide nanocages for high-performance hybrid supercapacitors: an experimental and computational investigation

Abstract

The reasonable design of the composition and hollow structure of electrode materials is beneficial for promoting the electrochemical properties and stability of electrode materials for high-performance supercapacitors, and it is...

Synthesis, Characterizations, and Electrochemical Performances of Highly Porous, Anhydrous Co0.5Ni0.5C2O4 for Pseudocapacitive Energy Storage Applications

“…The annealing product after structural water removal represents Co 0.5 Ni 0.5 C 2 O 4. The FT-IR study clearly shows the distinctive decrease in peak intensity of stretching vibration of the hydroxyl group (−OH) near 3381.73 cm –1 Figure e shows the BET results of the Co 0.5 Ni 0.5 C 2 O 4 sample.…”

“…Many studies are being carried out on transition metal oxide-based materials such as NiO, V 2 O 5 , spinel Co 3 O 4 , Fe 2 O 3 , and mixed spinel NiCo 2 O 4 to explore electrodes for the pseudocapacitor. − However, structural instability and performance degradation issues related to transition metal oxide lead to investigation of the novel framework structure for higher surface charge storage and better structural stability. − Metal–organic frameworks (MOFs) are used as an interesting open framework structure, where materials are constructed by joining metal-containing units with organic linkers, generating an interesting three-dimensional or two-dimensional network with permanent porosity . Highly porous metal–organic framework structures, especially utilizing an oxalate linker with active participation metal ion redox, are known to show faradic pseudocapacitive characteristics. − However, most of the oxalate materials have a high open structural space to accommodate the hydration of water, and that is why, most of the transition metal oxalates contain a structural water molecule. We have envisaged the controlled removal of structural water from the material to develop a novel porous structure that can accommodate a high degree of charge or anion intercalation/deintercalation couple with double layer capacitance to achieve superior capacitance .…”

Performance comparison of distinct bismuth molybdate single phases for asymmetric supercapacitor applications

“…Compared with lithium-ion batteries and capacitors, supercapacitors have a tremendous power density, prolonged life cycle, high self-discharge, and the ability to retain an enormous amount of electrical energy, which is attracting the attention of worldwide researchers. 5–7…”

Skillful Introduction of Urea during the Synthesis of MOF-Derived FeCoNi–CH/p-rGO with a Spindle-Shaped Substrate for Hybrid Supercapacitors

“…Furthermore, the morphology of electrode materials affects the electrochemical performance of composites significantly. 19 Metal ion etching using metal–organic framework (MOF) materials with large specific surface area and pore size as well as high porosity can be acted as self-templates, 20 resulting in CH nanosheets distributed on the templates with various surface morphologies. However, the bottleneck problems of CH composites, such as poor conductivity and cycling stability, seriously restrict their further application.…”