An Aqueous Hybrid Supercapacitor Employing Honeycomb-Shaped MoS2 Nanosheets as Anode

In this work, MoS₂ nanosheets (NSs) are applied as a novel anode to deliver a high-performance supercapacitor (SC). A MoS₂ NSs anode with a special honeycomb-shaped structure, is synthesized using a hydrothermal method, and subsequently applied in conjunction with an electrodeposited Co(OH)₂ NSs cathode to create a new cost-effective aqueous hybrid SC cell. The as-fabricated Co(OH)₂//MoS₂ hybrid SC exhibits a number of attractive characteristics, including: (1) a stable operation voltage window of 1.5 V; (2) remarkable cycling stability with a retention ratio of 92.3% after 4000 cycles; (3) an energy density of 24.0 Wh kg^-1 at a current density of 0.5 mA cm^-2 and a high power density of 1932.0 W kg^-1 at a current density of 2.5 mA cm^-2. The experimental results evidence that MoS₂ is a promising candidate for the development of SC anodes.