A lightweight and conductive MXene/graphene hybrid foam for superior electromagnetic interference shielding

By Zhimin Fan, Duola Wang, Yingbo Yuan, Youshan Wang, Zhongjun Cheng, Yuyan Liu, Zhimin Xie. 2020

402 citations recorded by the source corpus.

Abstract Three-dimensional (3D) structure graphene with lightweight and excellent electrical conductivity is a high-efficiency electromagnetic interference (EMI) shielding material that can be used to manage increasingly electromagnetic pollution. However, inferior electrical conductivity of the 3D graphene fabricated with graphene oxide (GO) as a precursor severely restrict its EMI shielding performance from meeting the needs of further applications. Herein, we developed a simple and feasible strategy to introduce highly conductive two-dimensional Ti3C2Tx MXene nanosheets into GO, and then fabricated a lightweight MXene/graphene hybrid foam (MX-rGO) by freeze-drying and reduction heat treatment. The improved foam electrical conductivity and highly efficient wave attenuation in interconnected porous structures enables MX-rGO with an excellent EMI shielding effectiveness (50.7 dB). In addition, the specific EMI shielding effectiveness (SSE, defined as shielding effectiveness divided by density) value of the MX-rGO can reach up to 6217 cm3 g−1 at a lower thickness, which is much higher than most of the EMI shielding materials reported thus far. Therefore, the lightweight and conductive MXene/graphene hybrid foam with superior EMI shielding performance has potential applications for the aerospace and next-generation smart devices.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/ba25301a59fd50bae68e1d7ddb2c1103f0da4cb9