3D heterostructure constructed by few-layer 1T MoS2 and MXene under high electrostatic fields for high-performance supercapacitors.

Electrostatic spray deposition (ESD) is a promising technique for preparing high-quality heterostructure materials to achieve high electrochemical performance. Moreover, the materials obtained by ESD possesses well-dispersed, bonder-free and easy-control advantages. Herein, we firstly report that 1T MoS 2 /Ti 3 C 2 T x heterostructure material is successfully constructed by few-layer 1T MoS 2 and Ti 3 C 2 T x MXene through ESD. The construction of heterostructure by high electrostatic fields is able to solve problem of agglomeration of layered materials, improve conductivity and stabilize 1T MoS 2 to realize outstanding electrochemical performance of supercapacitor. As expected, the binder-free 1T MoS 2 /Ti 3 C 2 T x heterostructure displays an excellent specific capacitance (1198 mF cm−2 at 3 mA cm−2), a high rate performance (45% as current density from 3 to 20 mA cm−2) and long-cycle life (73.8% capacity retention after 7000 cycles at 20 mA cm−2). More interestingly, a simple and efficient route to prepare 2D/2D heterostructure electrode for storing energy can be extended to other materials. [Display omitted] • The few-layer 1T MoS 2 is synthetized by hydrothermal and ultrasonic. • The heterostructure of 1T MoS 2 /Ti 3 C 2 T x @NF is prepared by ESD technology. • The heterostructure displays high capacitance of 1198 mF cm−2 at 3 mA cm−2. • The heterostructures with various concentrations MoS 2 show different performance. [ABSTRACT FROM AUTHOR]