In situ growth of hierarchical mesoporous NiCo2S4@MnO2 arrays on nickel foam for high-performance supercapacitors

Hierarchically constructed NiCo2S4@Ni(1-x)Co x (OH)2 core/shell nanoarrays and their application in energy storage

We report a new type of core-shell heterostructure consisting of a rod-like NiCo2S4 (NCS) core and an urchin-like Ni(1-x)Co x (OH)2 (NCOH) shell via a simple hydrothermal route coupled with a facile electrodeposition. NCS nanorod arrays (NRAs) can not only act as excellent electrochemically active materials by themselves, but they can also serve as hierarchical porous scaffolds capable of fast electron conduction and ion diffusion for loading a large amount of additional active materials. Moreover, it is observed that the urchin-like NCOH nanosheets coating could bind the inner NCS nanorods together and thereby reinforce the whole structure mechanically. Meanwhile, more effective pathways for electrons are available in the NCS@NCOH hybrids than an individual NCS nanorod. Benefiting from both structural and compositional features, the NCS@NCOH electrode exhibits greatly improved electrochemical performance with high capacity (3.54 C cm(-2) at 1 mA cm(-2)) and excellent cycling stability (78% capacity retention after 4000 cycles). Moreover, a battery-type device is also fabricated by using NCS@NCOH as a positive electrode and activated carbon (AC) as a negative electrode, displaying high capacity (2.51 C cm(-2) at 2 mA cm(-2)) and good durability (88.8% capacity retention after 4000 cycles) as well.

Chemical synthesis of 3D copper sulfide with different morphologies for high performance supercapacitors application

Schematic growth of copper sulfide as nanoflakes and nanotube like structure.

Interconnected CuS nanowalls with rough surfaces grown on nickel foam as high-performance electrodes for supercapacitors

Three-dimensional interconnected CuS nanowalls with rough surfaces on Ni foam were obtained through a facial ​ synthetic route. The binder-free electrode exhibits high electrochemical performance with excellent cycling stability.

3D hierarchical mesoporous NiCo2S4@Ni(OH)2 core–shell nanosheet arrays for high performance supercapacitors

A thin and porous active material on a carbon cloth was synthesized by electrodeposition and its electrochemical performance was studied.

Synthesis of a ternary FeNi2S4/CNT/graphene nanocomposite with improved electrochemical properties

A simple one-pot method is achieved for preparation of FeNi₂S₄–CNT–graphene nanocomposites, which displays a robust connection among ternary components.

Construction of three-dimensional CuCo2S4/CNT/graphene nanocomposite for high performance supercapacitors

Three-dimensional CuCo₂S₄–g–CNT nanocomposite with high supercapacitance was fabricated successfully with the hydrothermal method.

Controlled synthesis and comparison of NiCo2S4/graphene/2D TMD ternary nanocomposites for high-performance supercapacitors

Novel ternary electrode materials based on graphene, NiCo₂S₄, and transition metal dichalcogenides were designed and fabricated with the intention of exploiting synergistic effects conducive to supercapacitive energy storage.

Novel NiCo2S4@reduced graphene oxide@carbon nanotube nanocomposites for high performance supercapacitors

Novel three-dimensional NiCo₂S₄@rGO@CNT nanocomposite electrode material was synthesized.

Facile synthesis of Ni0.85Se on Ni foam for high-performance asymmetric capacitors

Ni_0.85Se was in situ grown on Ni foam via a facile hydrothermal process as a high-performance electrode for supercapacitors.