One-step hydrothermal synthesis of few-layered metallic phase MoS2 for high-performance supercapacitors

In recent years, molybdenum disulfide (MoS₂) has gained significant attention in the scientific community. Few-layered MoS₂ demonstrates unique properties and potential applications. However, the synthesis of few-layered and high-purity 1T-MoS₂ is still a challenge. In this study, we successfully employed a hydrothermal method to synthesize few-layered and high-purity 1T-MoS₂. The purity of the material is controlled by a combination of sodium borohydride and ethanol. Notably, the few-layered 1T-MoS₂ exhibits exceptional performance as a supercapacitor, including the high specific capacitance (250.3 ​F ​g⁻¹ at a current density of 1 ​A ​g⁻¹) and excellent long-trem cycling stability (90.7 ​% after 5000 cycles). Meanwhile, the asymmetric device assembled by 6-FL-1T-MoS₂ and active carbon on carbon cloths exhibits excellent flexibility and high energy and power density (23.1 ​μWh cm⁻² at 600 ​μW ​cm⁻², 55 ​μWh cm⁻² at 12000 ​μW ​cm⁻²). This work provides valuable insights into the synthesis of few-layered and high-purity 1T-MoS₂, opening up new avenues for further research and applications.