In situ shape and phase transformation synthesis of Co3S4 nanosheet arrays for high-performance electrochemical supercapacitors

Abstract

Porous single-crystalline nanosheet (NS) arrays of Co₃S₄ have been synthesized via a simple shape and phase transformation route, which exhibits high specific capacitance (1081 F g⁻¹ at 1.61 A g⁻¹) and areal capacitance (2.69 F cm⁻² at 4 mA cm⁻² and 2.33 F cm⁻² at 12 mA cm⁻²) with good cycling performance (96.2% capacitance retention after 3000 cycles).