Zeolitic imidazolate frameworks (ZIFs)-derived NixCo3−xO4/CNTs nanocomposites with enhanced electrochemical performance for supercapacitor

All Si3N4 Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

“…Based on the GCD curves at different current densities, the energy and power densities of the ASC were calculated and the relationship between them was plotted on the Ragone diagram (Figure 10b). At the power density of 2.7 kW kg −1 , the Si 3 N 4NWs @VGNs@NiCo 2 O 4HSs //Si 3 N 4NWs @VGNs@FeOOH NRs ASC could deliver a maximum energy density of 96.3 Wh kg −1 , and still kept energy density of 27 Wh kg −1 even at a high power density of 59.0 kW kg −1 , which were comparable with previously reported NiCo 2 O 4 ‐based ASC devices, such as NiCo 2 O 4 //Fe 3 O 4 , [ 54 ] NiCo 2 O 4 @PPy//AC, [ 55 ] NiCo 2 O 4 /NiO/Co 3 O 4 //AC, [ 56 ] NiCo 2 O 4 @MnO 2 //AC, [ 57 ] Ni x Co 3–x O 4 /CNTs//AC, [ 13 ] and Ni x Co 3– x O 4 /rGO//AC. [ 17 ]…”

“…[11] For active materials, transition metal oxides (TMOs) or hydroxides, due to their abundance, low cost, hypotoxicity, and multiple oxidation states, have been widely investigated and attracted considerable attention. [12][13][14] Among various TMOs, NiCo 2 O 4 is believed as one of the most promising positive electrode materials for flexible ASC, owning to the increased electrical conductivity and improved electrochemical properties. [15][16][17][18] However, because of bad structural stability during the electrochemical tests, the performance could not meet the requirement of the practical applications.…”

Dual-functional NiCo2S4 polyhedral architecture with superior electrochemical performance for supercapacitors and lithium-ion batteries

“…In addition, volume collapse during the reaction will lead to irreversible degradation on the cycling stability of electrode materials [12]. Herein, the rational design and synthese of mesoporous nano-architectures to increase surface reaction areas and to inhibit the structure collapse are appropriate techniques to realize the high-performance electrodes of supercapacitors [13][14][15].…”

Engineering of nickel‐cobalt oxide nanostructures based on biomass material for high performance supercapacitor and catalytic water splitting

“…These results confirm the previous finding that the mixture of transition metal oxides demonstrates better electrochemical performance. 59 Figure 4B shows the CDs of CFAC/Ni oxide, CFAC/Co oxide and CFAC/Ni&Co oxides. The nonlinear feature of the curves, confirming the Faradaic behavior of the electrodes.…”