MXene/RGO composite aerogels with light and high-strength for supercapacitor electrode materials

The existence of inevitable hole defects in the hydrothermal process of graphene hydrogels makes the strength of the prepared aerogel to be further improved. We design a simple self-assembly method of standing at room tempreture for preparing MXene/RGO composite aerogel. The strong forces from different directions make this three-dimensional (3D) porous aerogel unique fusiform shape and stiffer wall of the pores to exhibit favorable strength of 16.18 MPa and excellent cyclic compression performance at a load capacity up to 10 kg (2 MPa). And as a freestanding supercapacitior electrode, it shows excellent electrochemical energy storage performance of 233 F g⁻¹ at 1 A g⁻¹ with an outstanding cycling performance of 91.01% after 10,000 cycles. Besides, this research lays a certain theoretical reference for free-standing supercapacitor electrode materials.