Diethylenetriamine-assisted one-step hydrothermal synthesis of cotton-like CoS cluster for high-performance supercapacitor

Abstract

Cotton-like CoS cluster has been successfully synthesized via a simple one-step hydrothermal route assisted by diethylenetriamine (DETA) as a ligand and structure-directing agent. The structure and morphology of the product were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM) and N 2 adsorption-desorption isotherm. The CoS sample which has a hexagonal phase without any impurities possesses a microscopic morphology made by cotton-like clusters. The as-fabricated CoS as a supercapacitor electrode presents desirable supercapacitive performance with a high specific capacitance (664 F·g −1 at 0.5 A·g −1 ), remarkable rate capability and excellent cycling stability (85.7 % specific capacitance retention after 1000 cycles), making it applicable as an electrode for high-performance supercapacitors.

High‐performance electrodes for Li‐ion cell: Heteroatom‐doped porous carbon/ CoS structure and investigation of their structural and electrochemical properties

“…It is seen that the CoS alloy structure well matched the simulated and measured XRD patterns. The lattice parameters were given in Table 1 and are consistent with the work in the literature 37 . From obtained XRD results, it is seen that the lattice parameters were decreased with increasing the temperature, as seen in Table 1.…”