Supercapacitor based on the CuCo2S4@NiCoAl hydrotalcite array on Ni foam with high-performance

3D hierarchical core–shell structural NiCoMoS@NiCoAl hydrotalcite for high-performance supercapacitors

“…CV was performed in the potential range of −0.3–0.7 V at the 12 th cycle and GCD in the potential range of 0–0.45 V, while EIS was performed between 0.01 Hz and 100 kHz at the open circuit potential with a perturbation voltage of 5 mV. The specific charge ( C s ) and coulombic efficiency ( η ) were calculated based on eqn (1) and (2), 34 respectively:where C s , i and m are the specific charge (C g −1 ), discharge current (A) and mass of the active substance (g), respectively. Δ t and Δ V are the discharge time (s) and potential window (V), and Δ t C and Δ t D are times of charging and discharging at the same current.…”

“…In our previous work, the 3D-hierarchical mesoporous core-shell electrode materials (CuCo 2 S 4 @NiCoAl-LDH/NF and NiCoZnS@NiCoFe-LDH/NF) showed high specic charge and good cycling stabilities. 25,34,35 Herein, a novel binder-freed electrode material (hierarchical core-shell structural NiCoMoS@LDH on NF) was designed and fabricated via a hydrothermal calcination method. Compared with NiCoMoS and NiCoAl-LDH on NF, NiCoMoS@LDH exhibited a higher supercapacitor performance, owing to the unique core-shell structure and the synergy of NiCoMoS, NiCoAl-LDH and NF.…”

“…In our previous work, the 3D-hierarchical mesoporous core–shell electrode materials (CuCo 2 S 4 @NiCoAl-LDH/NF and NiCoZnS@NiCoFe-LDH/NF) showed high specific charge and good cycling stabilities. 25,34,35…”

Morphological evolution of carnation flower-like Cu2CoSnS4 battery-type electrodes

“…The galvanostatic charge discharge study was carried out for different current density 0.5, 1, 2, 3 and 5 A/g values for all the electrodes (Fig. 8a-d densities, the specific capacity values decrease as the rate of redox reaction is lower [53]. The stability of the best performed CCTS-18 electrode studied at 5 A/g, and retained capacitance of 77.67 % for 5000 charge discharge cycles (Fig.…”

Facile Preparation and Performances of Ni, Co, and Al Layered Double Hydroxides for Application in High-Performance Asymmetric Supercapacitors

“…Compared with other common methods, such as the coprecipitation method 19 and sol−gel method 20 for the synthesis of NiCoAl-LDH materials, the hydrothermal method for synthesis of LDH materials is simple and environmentally friendly; moreover, it can successfully adjust the structure and morphology of the LDH materials, which is conducive to obtaining LDH materials with excellent performance. Zeng et al 21 synthesized a novel CuCo 2 S 4 @NiCoAl-LDH with a 3D hierarchical core−shell structure arrayed on Ni foam by a hydrothermal method. The picturesque structure and the synergy of two materials make the electrode exhibit excellent electrochemical performance.…”