A Facile and Effective Method for Constructing Rambutan‐Like NiCo₂O₄ Hierarchical Architectures for Supercapacitor Applications

Abstract

Rambutan‐like NiCo2O4 hierarchical architectures have been fabricated effectively by facile chemical bath deposition and subsequent thermal annealing free of any template and surfactant. The corresponding formation mechanism has also been investigated by continuously controlling the reaction conditions. Supercapacitors assembled with the as‐synthesized rambutan‐like NiCo2O4 displayed a specific capacitance of 798 F g–1 at 0.5 A g–1, with 520 F g–1 still remaining even at a high current density of 20 A g–1, and good cycling stability with 91.7 % retention of the maximum capacitance (632 F g–1) after 1500 cycles at 2 A g–1. The outstanding electrochemical properties of the rambutan‐like NiCo2O4 hierarchical architectures show great potential for application as high‐performance supercapacitors.

Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo2O4

“…Its specific capacitance is ≈580.0 F g −1 at the current density of 1 A g −1 , much lower than that of Ni‐Co‐12. Figure S9 (Supporting Information) shows a comparison of the specific capacitance of Ni‐Co‐12 aerogel with those of other materials previously reported . Obviously, our results are much better than those reported by others.…”

One‐Step Controllable Synthesis of Mesoporous MgCo2O4 Nanosheet Arrays with Ethanol on Nickel Foam as an Advanced Electrode Material for High‐Performance Supercapacitors

“…is as eries of promising candidates as anode materials for lithium ion batteries and electrode materials for supercapacitors. [23][24][25][26][27] In the MCo 2 O 4type materials, the change of the valence of Me lement and Co element both contribute to the electrochemical properties of the materials. Therefore, we chose the constant valence element Mg as the Msite of MCo 2 O 4 to exclusively investigate the influence of the morphology on electrochemical properties.…”

“…Among all the spinel type TTMOs electrode materials, MCo 2 O 4 (M=Ni, Zn, Cu, Mn, Mg, etc.) is a series of promising candidates as anode materials for lithium ion batteries and electrode materials for supercapacitors . In the MCo 2 O 4 ‐type materials, the change of the valence of M element and Co element both contribute to the electrochemical properties of the materials.…”

Polyoxometalate-Incorporated Metallacalixarene@Graphene Composite Electrodes for High-Performance Supercapacitors

“…In the quest for clean and efficient energy storage systems, supercapacitors are important to address the pressing need of energy demands. , In terms of working mechanism, supercapacitors are constructed by pseudocapacitors and electric double-layer capacitors (EDLCs). Generally, the pseudocapacitors have more advantages of electrochemical behavior than the EDLCs, such as higher specific capacitance, durability, and so on. , The electrode material is accredited to the pivotal center of a pseudocapacitor, which directly affects the performance of the pseudocapacitor. Motivated by the aforementioned consideration, multitudinous endeavors have been efficiently catered to the tendency for searching electrode materials for pseudocapacitors.…”