Enhanced capacitance and rate performance of Ti₃C₂TX (MXene)/RGO electrodes for asymmetric supercapacitor applications
摘要
Enhancing the capacitance and rate performance of carbon-based electrodes in supercapacitors is a significant problem for commercial feasibility. To fulfil these specifications, Ti3C2Tx (MXene)/reduced graphene oxide (RGO) electrodes were synthesised by a one-step hydrothermal process followed by carbonisation for use as supercapacitor electrodes. The physico-chemical characteristics of the electrodes are characterised by X ray diffraction (XRD), Scanning electron microscope (SEM), Raman spectroscopy, N2 adsorption-desorption and X-ray photoelectron spectra (XPS) analysis. The Ti3C2Tx MXene/RGO exhibits a capacitance of 335 Cg− 1 at 1 Ag− 1 in a 1 M KOH electrolyte, maintaining 305 Cg− 1 at 5 A g− 1, along with a commendable lifespan. Furthermore, the constructed asymmetric device exhibited a substantial potential window (1.5 V) and a significant specific capacitance (235 Cg− 1 at 1 A g− 1). Furthermore, the ASC device has a substantial energy density of around 32.4 Wh kg− 1, with a power density of 2917 W kg− 1, and demonstrates prolonged stability with around 82% retention after 10,000 cycles. The proposed method provides an alternate technique for fabricating stretchable MXene-based energy storage devices and may be applied to additional members of the extensive MXene family.