Synthesis of copper sulfide nanowire arrays for high-performance supercapacitors

Doping Zn(2+) in CuS Nanoflowers into Chemically Homogeneous Zn0.49Cu0.50S1.01 Superlattice Crystal Structure as High-Efficiency n-Type Photoelectric Semiconductors

Doping Zn(2+) in CuS nanoflower into chemically homogeneous superlattice crystal structure is proposed to convert p-type CuS semiconductor to an n-type CuS semiconductor for significantly enhanced photoelectric response performance. In this study, the chemically homogeneous Zn-doped CuS nanoflowers (Zn0.06Cu0.94S, Zn0.26Cu0.73S1.01, Zn0.36Cu0.62S1.02, Zn0.49Cu0.50S1.01, Zn0.58Cu0.40S1.02) are synthesized by reacting appropriate amounts of CuCl and Zn(Ac)2·2H2O with sulfur powders in ethanol solvothermal process. By tuning the Zn/Cu atomic ratios to ∼1:1, the chemically homogeneous Zn-doped CuS nanoflowers could be converted to the perfect Zn0.49Cu0.50S1.01 superlattice structure, corresponding to the periodic Cu-S-Zn atom arrangements in the entire crystal lattice, which can induce an effective built-in electric field with n-type semiconductor characteristics to significantly improve the photoelectric response performance, such as the lifetime of photogenerated charge carriers up to 6 × 10(-8)-6 × 10(-4) s with the transient photovoltage (TPV) response intensity to ∼44 mV. This study reveals that the Zn(2+) doping in CuS nanoflowers is a key factor in determining the superlattice structure, semiconductor type, and the dynamic behaviors of charge carriers.

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.

Nanostructured CuS networks composed of interconnected nanoparticles for asymmetric supercapacitors

Nanostructured CuS networks composed of interconnected nanoparticles are demonstrated as promising electrodes for asymmetric supercapacitors.

A facile one-step route to synthesize the three-layer nanostructure of CuS/RGO/Ni3S2 and its high electrochemical performance

A three-layer nanostructure of CuS/RGO/Ni₃S₂ composite was in situ grown on nickel foam through a one-step hydrothermal-assisted process. This special architecture exhibited good supercapacitor electrochemical performance.

Ultrafast mechanochemical synthesis of copper sulfides

Covellite, CuS and chalcocite, Cu₂S were prepared within a few seconds by ball milling of the elemental precursors.

Synthesis of porous Cu7.2S4 sub-microspheres by an ion exchange method for high-performance supercapacitors

The porous Cu_7.2S₄ sub-microspheres were synthesized by an ion exchange reaction and their electrochemical supercapacitor properties were investigated in 6 M aqueous KOH solution.

One-Pot Synthesis of Copper Sulfide Nanowires/Reduced Graphene Oxide Nanocomposites with Excellent Lithium-Storage Properties as Anode Materials for Lithium-Ion Batteries

Copper sulfide nanowires/reduced graphene oxide (CuSNWs/rGO) nanocompsites are successfully synthesized via a facile one-pot and template-free solution method in a dimethyl sulfoxide (DMSO)-ethyl glycol (EG) mixed solvent. It is noteworthy that the precursor plays a crucial role in the formation of the nanocomposites structure. SEM, TEM, XRD, IR and Raman spectroscopy are used to investigate the morphological and structural evolution of CuSNWs/rGO nanocomposites. The as-fabricated CuSNWs/rGO nanocompsites show remarkably improved Li-storage performance, excellent cycling stability as well as high-rate capability compared with pristine CuS nanowires. It obtains a reversible capacity of 620 mAh g(-1) at 0.5C (1C = 560 mA g(-1)) after 100 cycles and 320 mAh g(-1) at a high current rate of 4C even after 430 cycles. The excellent lithium storage performance is ascribed to the synergistic effect between CuS nanowires and rGO nanosheets. The as-formed CuSNWs/rGO nanocomposites can effectively accommodate large volume changes, supply a 2D conducting network and trap the polysulfides generated during the conversion reaction of CuS.

Nanostructured copper sulfides: synthesis, properties and applications

Copper sulfides are the most extensively studied materials due to their non-toxicity, semiconducting nature and tunable properties. In view of this, present review article discusses various synthetic strategies for the fabrication of nanostructured copper sulfides of different morphologies and properties comprehensively followed by their applications in various fields.

Synthesizing highly conductive cobalt sulfide hydrangea macrophylla using long carbon-chain sulfur source for supercapacitors

Novel cobalt sulfide hydrangea macrophylla with conductive carbon layer on the surface was synthesized in a one-pot method using 1-dodecanethiol as the sulfur source connected with long carbon chains as the electroactive material for supercapacitors.