Broadband high-performance microwave absorption of the single-layer Ti3C2Tx MXene

MXenes, a family of two-dimensional (2D) materials, exhibit peculiar microwave-absorbing behaviors due to their unique chemical composition and structure. Although laminated Ti 3 C 2 T x MXenes with a multilayer structure have been used for microwave absorption, real 2D MXenes with a single-layer structure have not yet been investigated. Here, the electromagnetic wave response behavior of single-layer Ti 3 C 2 T x MXenes was explored in detail. The permittivity of Ti 3 C 2 T x MXene rises dramatically with an increase in filler loading, and Ti 3 C 2 T x MXene features a distinct dielectric response wherein dipolar polarization and interfacial polarization makes a greater contribution at low filler loading; conductive loss becomes more prominent at high filler loading. Versus laminated Ti 3 C 2 T x MXene, single-layer Ti 3 C 2 T x MXene delivers superior absorbing capability: The RL min value of SL-Ti 3 C 2 T x -22% reaches -43.5 dB at 6.5 GHz, and a broad EAB of 6.88 GHz can be attained at a thickness of 1.8 mm due to enhanced dipolar polarization, interfacial polarization, and conductive loss. This work is of great significance in guiding the future development of MXene-based absorbers. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Automated summary

This study investigates the electromagnetic wave response behavior of single-layer Ti3C2Tx MXenes and discovers their superior microwave absorbing capability, providing important guidance for the future development of MXene-based absorbers.