Analysis of the Influence of Different Mechanical Delaminating Process on the Electrochemical Performance of MXene Films

MXene is a new type of two-dimensional nanomaterials with good electrochemical properties, which can be used as electrode materials for supercapacitors. And the electrochemical performance of the few-layered MXene is better than that of the multilayered MXene. The differences in the microstructure and electrochemical properties of the thin films obtained by three different mechanical layering methods, namely, hand-shaking treatment, ultrasonic treatment and step-by-step ultrasonic treatment, were studied. The results show that the ultrasonic treatment of MXene is not only simple and efficient, but also the self-supporting film of MXene prepared by vacuum assist has the advantages of low density and high conductivity. Compared with the other two methods, the electrochemical performance of the thin film prepared by ultrasonic treating is also the best. The oxidation peak is obvious in cyclic voltammetry test, the voltage drop is small when the constant current is charged and discharged, the energy conversion is high, the impedance spectrum shows the internal impedance is the smallest, and the ion diffusion rate is the largest. The comparison results show that the ultrasonic treatment can be used as a stable process for delaminating MXene, which provides a reference for the subsequent MXene composite experiments.