• 文献标题:   Multifunctional Graphene Microstructures Inspired by Honeycomb for Ultrahigh Performance Electromagnetic Interference Shielding and Wearable Applications
  • 文献类型:   Article
  • 作  者:   XU JD, LI RS, JI SR, ZHAO BC, CUI TR, TAN XC, GOU GY, JIAN JM, XU HK, QIAO YC, YANG Y, ZHANG S, REN TL
  • 作者关键词:   emi shielding, honeycomb graphene, mxene, agnw, wearable electronic
  • 出版物名称:   ACS NANO
  • ISSN:   1936-0851 EI 1936-086X
  • 通讯作者地址:  
  • 被引频次:   63
  • DOI:   10.1021/acsnano.1c01552 EA APR 2021
  • 出版年:   2021

▎ 摘  要

High-performance electromagnetic interference (EMI) shielding materials with ultralow density, excellent flexibility, and good mechanical properties are highly desirable for aerospace and wearable electronics. Herein, honeycomb porous graphene (HPG) fabricated by laser scribing technology is reported for EMI shielding and wearable applications. Due to the honeycomb structure, the HPG exhibits an EMI shielding effectiveness (SE) up to 45 dB at a thickness of 48.3 mu m. The single-piece HPG exhibits an ultrahigh absolute shielding effectiveness (SSE/t) of 240 123 dB cm(2)/g with an ultralow density of 0.0388 g/cm(3), which is significantly superior to the reported materials such as carbon-based, MXene, and metal materials. Furthermore, MXene and AgNWs are employed to cover the honeycomb holes of the HPG to enhance surface reflection; thus, the SSE/t of the HPG/AgNWs composite membrane can reach up to 292 754 dB cm(2)/g. More importantly, the HPG exhibits excellent mechanical stability and durability in cyclic stretching and bending, which can be used to monitor weak physiological signals such as pulse, respiration, and laryngeal movement of humans. Therefore, the lightweight and flexible HPG exhibits excellent EMI shielding performance and mechanical properties, along with its low cost and case of mass production, which is promising for practical applications in EMI shielding and wearable electronics.