Structural Strategies of MXene-Based Materials for Thermoconductive Electromagnetic Interference Shielding Materials with Excellent Mechanical Flexibility

MXenes, which are a type of 2D transition metal carbides and nitrides, have shown great potential as electromagnetic interference (EMI) shielding materials owing to their properties of electrical conductivity, low density, and flexibility. However, the weak interfacial interaction and the low thermal conductivity of MXenes resulted in poor mechanical flexibility and heat-dissipating capability. In this study, we developed structural strategies of MXenes-based carbon nanomaterials to fabricate MXenes films with enhanced mechanical strength, electromagnetic interference (EMI) shielding, and thermal conductivity properties. Compared to MXene films, the resulting hybrid MXenes films exhibited significantly improved mechanical strength of over 270 MPa, a toughness of 5 MJ m^-3, EMI shielding effectiveness of 70 dB, and an ultrahigh in-plane thermal conductivity of 110 W m^-1K^-1. This study presents a promising methodology for the development of high-performance materials that exhibit mechanical flexibility, electrical conductivity, electromagnetic interference shielding, and thermal conductivity properties.