MOF-derived hierarchical core–shell hollow Co₃S₄@NiCo₂O₄ nanosheet arrays for asymmetric supercapacitors

Abstract

Transition metal sulfides (TMSs) have been widely explored as electrode materials for supercapacitors (SCs). Nevertheless, the application of single TMS is limited due to its lattice expansion and dissolution in...

Oxygen vacancy-engineered ultrathin NiCo2O4 nanosheet arrays derived from MOFs as an advanced electrode for supercapacitors

“…All the CV curves display obvious redox peaks, which are related to the faradaic redox reaction of M–O/M–O–OH (M refers to Ni or Co). 27 It is found that 0.1-O v -NiCo 2 O 4 /NF has the most significant peak and the largest area enclosed by the CV curve, implying that it possesses the highest capacitance. Fig.…”

Structural Design of Electrocatalytic Electrodes of Zn-Ni-S/Ni-Co-P Microspheres to Improve Stability and Activity for Supercapacitors and Water Splitting

“…When the scanning rates were 30 mV/s, the electrochemical reaction of ZNS and NCP was controlled by diffusion and capacitance equally. With the increasing scanning rates, the electrochemical reaction was changed to being controlled by the capacitance. , However, at any scanning rate, the electrochemical reactions of ZNS/NCP electrodes were mainly controlled by diffusion. It was different from those of ZNS and NCP, especially at a higher scanning rate, which reveals that the porous microspheres could facilitate the penetration of ions.…”

The Hierarchical Structures of Co3S4 Hollow Nanotube Arrays Wrapped with NiCo‐Layered Double Hydroxide Nanosheets for High‐Performance Asymmetric Supercapacitors

“…To overcome these challenges, cleverly designing composite materials with various structures and morphs shows promising prospects in realizing ultrahigh energy storage performance. [21][22][23][24] For instance, the hybrid electrode composed of Co 3 S 4 nanospheres and WS 2 nanorods was grown by a concise one-step solvothermal method, which provided startling cyclic property (92% of capacitance reserved after 2000 cycles) and specific capacity (412.7 F g À1 of 1 A g À1 ). [25] The MnS/Co 3 S 4 hybrid sample probed by Li et al with anion replacement method obtained the specific capacity of 576 F g À1 under 1 A g À1 , and the capacity retention could reach 93.1% after 2000 cycles.…”