Synthesis of ultrafine CoNi2S4 nanowire on carbon cloth as an efficient positive electrode material for high-performance hybrid supercapacitors

High-Energy-Density Asymmetric Supercapacitor Based on Layered-Double-Hydroxide-Derived CoNi2S4 and Eco-friendly Biomass-Derived Activated Carbon

“…Panels c and d of Figure illustrate the CV and GCD curves of the as-constructed CoNi 2 S 4 //MAC ASC device, and the specific capacitance was found to be ∼155.75 F/g at 2 A/g and still appreciable at 37.2 F/g at 5 A/g (a schematic illustration of the ASC device is shown in Figure a). Remarkable energy densities of 55.37 and 10.66 Wh/kg at power densities of 3200 W/kg and 10.66 kW/kg, respectively, were achieved as presented in the Ragone plot (Figure b) and found to be admirable when compared to many reports in the literature. ,,,, The stability studies were carried out for 5000 long charge–discharge cycles, which proved that the device showed a coulombic efficiency of 95.90% with a capacitance retention of 90.03%, as represented in Figure c. During the charge–discharge process in cyclic stability of an ASC, the volume of the positive electroactive material experiences a contraction and expansion process.…”

“…Remarkable energy densities of 55.37 and 10.66 Wh/kg at power densities of 3200 W/kg and 10.66 kW/kg, respectively, were achieved as presented in the Ragone plot (Figure 7b) and found to be admirable when compared to many reports in the literature. 27,38,39,47,48 The stability studies were carried out for 5000 long charge−discharge cycles, which proved that the device showed a coulombic efficiency of 95.90% with a capacitance retention of 90.03%, as represented in Figure 7c.…”

Comprehensive Review on Bimetallic (Ni and Co)-Chalcogenides and Phosphides with Three-Dimensional Architecture for Hybrid Supercapacitor Application

“…The effect of porosity has been explained by Yang et al by preparing 3D porous architectures of NiCo-S on CC using the hydrothermal method. 108 The as-fabricated NiCo-S on CC demonstrated high specific capacitance of 1872 F g −1 at 1 A g −1 . This enhanced electrochemical performance of the asprepared electrode can be due to an increase in the specific surface areas of the material, high electrical conductivity due to the low resistance of NiCo-S, and the compact bond between NiCo-S nanowires and carbon fibers.…”

“…The improved porosity helped in a faster ion intercalation/deintercalation process and reduced volume expansion trouble. The effect of porosity has been explained by Yang et al by preparing 3D porous architectures of NiCo-S on CC using the hydrothermal method . The as-fabricated NiCo-S on CC demonstrated high specific capacitance of 1872 F g –1 at 1 A g –1 .…”

An Integrated Cathode Engineered by Hierarchical Honeycomb‐Like Copper‐Molybdenum Sulfide Nanosheets for Hybrid Supercapacitor with Improved Energy Storage Capability

“…[22] Yang and coworkers fabricated ultrafine CoNi 2 S 4 nanowire on carbon cloth for SC electrode, which delivered a specific capacitance of 1872 F g À 1 at 1 A g À 1 and superior rate performance. [23] Yan recently presented flower-like FeCo 2 S 4 /reduced graphene oxide films, which demonstrated a high specific capacitance of 2487.97 F g À 1 with magnificent cyclic stability of 95.9 % capacitance attenuation after 5000 cycles. [24] It should be mentioned that polymer binders and conductive agents are generally used in the traditional bimetallic TMSs electrodes, which inevitably obstruct the ion-diffusion aisles, and cover the active reaction sites in electrodes, thus significantly damping the electrochemical properties.…”