Microwave-assisted synthesis of few-layered MXene Ti3C2 with high specific capacitance and low impedance for supercapacitor

MXene Ti 3 C 2 obtained by original Ti 3 AlC 2 precursor has a typical accordion structure, which is composed of multiple layers of Ti 3 C 2 , known as multilayer Ti 3 C 2 . MXene Ti 3 C 2 obtained by treating Ti 3 AlC 2 precursor and ultrasonic intercalation is composed of one or several layers of Ti 3 C 2 , which is known as few-layered Ti 3 C 2 . Due to the strong force between the layers of Ti 3 C 2 , it is easy to stack in the long charge–discharge cycle, and it is difficult to embed load ions, resulting in capacitance attenuation. This work proposed a delamination method of multilayer Ti 3 C 2 using microwave-assisted etching and obtained few-layered Ti 3 C 2 as a result. As traditional centrifuge involves a lot of mechanical agitation and centrifuging, an efficient delamination is a good contribution to the field. The few-layered Ti 3 C 2 was applied as a supercapacitor electrode in neutral pH electrolyte KCl and found improved performance over the multilayer Ti 3 C 2 . This provides a new direction for the efficient synthesis of few-layered Ti 3 C 2 with high specific mass capacitance and low impedance as electrode materials for supercapacitors.