Preparation of Ti3C2Tx MXene/GO Composites with Enhanced Electrochemical Performance as the Electrode of Lithium-Ion Capacitors

Ti3C2Tx MXene has been actively studied as a promising energy storage material. In this paper, Ti3C2Tx MXene was prepared by selective removal of Al from Ti3AlC2 structure and then composited with graphene oxide (GO) to further improve the performance of Ti3C2Tx MXene. The as-prepared samples were characterized by using SEM and XRD techniques. SEM images of the Ti3C2Tx MXene exhibits a typical accordion-like morphology after removal of Al from Ti3AlC2 structure. The multiple-layered MXene were exfoliated into mono- or few-layered ones by using ultrasound assisted approach. XRD results indicate that the (002) crystal plane are left-shifted due to the surface termination and larger interlayer spaces of the samples. Electrochemical tests of the samples indicate the sample of Ti3C2Tx MXene composited with 0.5 g GO exhibits a capacity of 758 F/g at the scan rate of 10 mV/S, with the increasing of scan rate, the capacity retention rate is 58.83%, which is regarded as the optimum electrode.