Construction of Lightweight and Robust Ti3c2tx/Cnts Foams with Tunable and Highly Efficient Microwave Absorption Performance

In this work, lightweight and robust Ti 3 C 2 T x /CNTs foams were fabricated by a HCl induced self-assembly as well as vacuum freeze-drying process. In contrast to monolithic Ti 3 C 2 T x foams, the incorporation of CNTs effectively improves the electrical conductivity (EC) and mechanical elasticity of the foam, prevents the stacking of Ti 3 C 2 T x nanosheets and produces a more developed 3D honeycomb-like porous network structure, which dramatically ameliorate impedance matching and enhance the multiple reflection, conduction loss and interface polarization, and jointly lead to a superb microwave absorption performance. By immersing it into the melted paraffin and cutting into coaxial ring samples, an optimum RL of -48.8 dB (1.72 mm) and a maximum EAB of 5.44 GHz (1.92 mm) were obtained when loading 4wt% absorber. Moreover, the EAB could be regulated from 4.16 GHz to 18 GHz as the thickness increases from 1.52 mm to 4.92 mm. This work provides a facile strategy for constructing lightweight and robust Ti 3 C 2 T x /CNTs foams, conforming the combined pursuit of light weight, thin thickness, broad EAB and intense dissipation capability for microwave absorption materials (MAMs)