CuCoNi–S anchored CoMoO₄/MoO₃ forming core–shell structure for high-performance asymmetric supercapacitors

Abstract

CoMoO4/MoO3@CuCoNi–S is prepared by hydrothermal and electrodeposition methods. It offers promising supercapacitor properties.

One-step electrodeposited Ni3S2/Co9S8/NiS composite on Ni foam as high-performance electrode for supercapacitors

“…Obviously, the Ni 3 S 2 /Co 9 S 8 /NiS-7 electrode displays the maximum specific capacitance among its contenders. Compared with reported similar literatures, 49–56 the Ni 3 S 2 /Co 9 S 8 /NiS-7 electrode displays superior capacitive performance (Table S1†). Fig.…”

“…Obviously, the Ni 3 S 2 /Co 9 S 8 /NiS-7 electrode displays the maximum specific capacitance among its contenders. Compared with reported similar literatures, [49][50][51][52][53][54][55][56] Generally, in the initial stage of the cyclic test, the electrode material will generate a self-activation process, the activity of the excited material increases, and the specific capacitance has an obvious enhance compared with the initial specific capacitance. To illustrate the increase in capacity, we measured the XRD of the Ni 3 S 2 /Co 9 S 8 /NiS-7 electrode after 1600 cycles (Fig.…”

Integrated design and construction of the NiMoS4@Co9S8/Ni3S2 hollow core–shell heterostructure for high-performance asymmetric supercapacitors

“…10 Due to the significant increase of the Co 3+ content, the peak of Co 2p shifted to higher binding energy. 26,27 The S 2s and Mo 3d 5/2 peaks of Mo 3d still exist, indicating that the Redox reaction of Mo is reversible during charge and discharge. 10,38 The disappearance of the Mo 3d 3/2 peak may be due to the pulverization of the NiMOS 4 shell due to volume expansion.…”

“…Furthermore, recent achievements have demonstrated that the core-shell heterostructures are more excellent, especially taking hollow nanotubes as cores and hierarchical nanosheets as the shell, which can shorten the ion diffusion path and buffer the volume change during the chargedischarge processes, respectively. [24][25][26][27] Therefore, in order to increase the energy storage capacity, hollow structure arrays can be introduced into transition metal sulfide composites with a core-shell structure to increase the pathway for ion diffusion and improve the energy density of supercapacitor devices.…”

High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated AgxO over Co–Mn–Cu Ternary Metal Oxide

“…37,38 In general, there are many ways to enhance the performance of TMO electrodes, like the addition of carbon-based material, 39 incorporation of different transition metal cations, 40 and making hybrid morphology. 41 Flower-like hybrid morphology of FeCo 2 S 4 / reduced graphene oxide demonstrated very high conductivity and delivered an energy density of 88.2 W h kg −1 . 7 100% capacitance retention was achieved for the supercapacitor by making the composite of ZnO and reduced graphene oxide.…”