Heterogeneous Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene-MWCNT@MoS<sub>2</sub> Film for Enhanced Long-Term Electromagnetic Interference Shielding in the Moisture Environment
Sarab Ahmed, Baosong Li, Shaohong Luo, Kin Liao
Abstract
High Resolution Image Download MS PowerPoint Slide MXene, as a novel two-dimensional (2D) material, has unique inherent features such as lightweight, flexibility, high electrical conductivity, customizable surface chemistry, and facile solution processability. However, utilizing MXene (Ti 3 C 2 T x ) films for long-term electromagnetic interference (EMI) shielding poses challenges, as they are susceptible to chemical deterioration through oxidation into TiO 2 . In this work, an ultrathin heterogeneous film of Ti 3 C 2 T x MXene integrated with multiwalled carbon nanotubes supporting MoS 2 clusters (MXene/MWCNT@MoS 2 ) was developed. The heterogeneous film with 15 wt % of MWCNT@MoS 2 clusters exhibited improved EMI shielding performance such as the highest EMI shielding effectiveness of 50 dB and the specific shielding effectiveness of 20,355 dB cm 2 g –1, mainly attributed to the excellent electrical conductivity, distinctive porous structure, and multiple interfacial interactions. The heterogeneous films underwent extended exposure to a moisture environment (35 days), and their structural stability and EMI shielding performance were enhanced by the integration of MWCNT@MoS 2 clusters. As a result, the engineered heterostructure of multilayered hybrid films holds promise as a viable option for improving the EMI shielding effectiveness and stability of Ti 3 C 2 T x MXene.