Solvothermal synthesis of hierarchical flower-like β-NiS with excellent electrochemical performance for supercapacitors

A hierarchical flower-like β-NiS architecture has been successfully synthesized via a solvothermal method with diethanolamine as the coordination agent and solvent. When evaluated as an electrode material for supercapacitors, impressive electrochemical performances are achieved, with high specific discharge capacitances of 857.76 F g−1 at 2 A g−1 and 512.96 F g−1 at 5 A g−1.