Flexible Graphene/MXene\nComposite Thin Films for High-Performance\nElectromagnetic Interference Shielding and Joule Heating

Abstract

The development of flexible films with excellent electromagnetic\ninterference (EMI) shielding and enhanced thermal management capabilities\nis highly desired to meet the ever-growing demands for portable and\nminiaturized electronics. Herein, graphene/MXene (G/M) composite thin\nfilms with unique structure, excellent flexibility, and outstanding\nEMI shielding capability are fabricated by integrating MXene nanosheets\nwith a three-dimensional porous graphene film <i>via</i> a facile vacuum-assisted filtration method. Notably, the obtained\nG/M composite thin film with a thickness of 100 μm possesses\na high EMI shielding effectiveness of up to 96.3 dB. This remarkable\nEMI shielding performance is attributed to the synergistic effect\nbetween the wrinkled structure of the MXene layer and the interconnected\nporous network of the graphene film, thereby ensuring excellent electrical\nconductivity and superior mechanical properties. Additionally, the\npolymer-modified G/M composite thin film shows an excellent electrothermal\nconversion capability under a low driving voltage. This work provides\na facile strategy for fabricating flexible composite thin films toward\npractical EMI shielding and thermal management applications in next-generation\nminiaturized flexible electronics.