Facile synthesis and superior supercapacitor performances of three-dimensional cobalt sulfide hierarchitectures

One-pot synthesis of hierarchically nanostructured Ni3S2 dendrites as active materials for supercapacitors

“…The pseudocapacitive performance of the present Ni 3 S 2 dendrites is lower than that of ternary nickel-cobalt sulfide nanostructures with intrinsic highest electronic conductivity, [26] but it is has a competitive specific capacitance compared to other conventional binary sulfides. [24,25] In order to further understand the fundamental behavior such as the charge-transfer and electrolyte diffusion process, the EIS measurement at a frequency range of 0.1 Hz to 100 kHz is conducted. As shown in Fig.…”

“…As one of the most promising energy storage devices, supercapacitors, also known as electrochemical capacitors, have attracted intensive research attention recently, due to their ultrahigh power density, fast charging/discharge rate and long lifespan. [18][19][20][21][22][23][24][25][26] Until now, many reports about the synthesis of dendritic structures used as pseudocapacitive have been found, [27,28] because they may supply a large specific surface area and short diffusion path for electrons and ions, benefit for enhancing their electrochemical properties. For example, Jeong et al reported the fabrication of dendritic hydrous ruthenium oxide for supercapacitors, which used as an electrode showed a good capacitance of 809 Fg À1 at 1.5 Ag À1 .…”

Nano-structured Bimetallic (Ni,Co) Sulphide Complex, Synthesis Characterization and Thin Film Deposition by PVD Assisted Technique

“…Thus it is suggested that compound formed is excellent material for use in supercapacitors and also as an electrode material. alkaline medium, nanoparticles of cobalt sulfide sustained on graphene have been used as ORR catalysts [22,23] . In addition, CoS 2 crystals synthesized by hydrothermal process show a high geometric symmetry, had distinct octahedral structures that are highly uniform with a mean edge length of ~360 nm and usefulness of as synthesized CoS 2 as electrode material for supercapacitors is ascribed to its pseudo capacitive properties and excellent cycling stability [24] .…”

Investigation of carbon nanotubes decorated with cobalt sulfides of different phases as nanocomposite catalysts in dye-sensitized solar cells

“…presents the XRD diffraction patterns of the as-prepared nanocomposites.As for the nanocomposite annealed at 400 o C under high-purity N 2 atmosphere, all of the diffraction peaks can be unambiguously indexed to the crystalline CoS 1.097 with a hexagonal structure (JCPDS #19-366) except for the weak broad peak at 25.8 o from the CNTs (marked as α)[16,30,31]. After annealing at 600 o C under N 2 atmosphere; however, the most of crystalline CoS 1.097 was transformed in the form of Co 9 S 8 structure (JCPDS #65-1765) on the CNTs[32,33], as shown in the diffraction peaks.This suggests that the CoS 1.097 based nanocomposite (designated as CNT@CoS 1.097 ) was transformed in the form of Co 9 S 8 -dominant nanocomposite (designated as…”