Triethylenediamine-assisted one-step hydrothermal synthesis of polyhedron-shaped Co3S4 for high performance supercapacitor

Abstract We describe a facile one-step hydrothermal route to devise and synthesize polyhedron-shaped Co 3 S 4 nanomaterial assisted by triethylenediamine (TEDA) as ligand and structure-directing agent. The structural characterizations indicate that the obtained products are Co 3 S 4 polyhedral nanoparticles with irregular size, which interconnect and stack each other to construct an interlinked microstructure. When investigated for its supercapacitance property, the as-fabricated Co 3 S 4 electrode material exhibits typical pseudocapacitance performances with a high specific capacitance of 1038 F g −1 at a current density of 0.5 A g −1 and excellent cycling stability of only 10.2% decay in its original specific capacitance after 1000 galvanostatic charge-discharge cycles, suggesting its potential application in supercapacitor. Importantly, this facile TEDA-assisted hydrothermal method can be universal to obtain other transition metal chalcogenides for supercapacitors.