Lightweight and flexible 3D graphene microtubes membrane for high-efficiency electromagnetic-interference shielding

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 387; p. 124025
• Main Authors: Yin, Xuemin, Li, Hejun, Han, Liyuan, Meng, Jiachen, Lu, Jinhua, Zhang, Leilei, Li, Wei, Fu, Qiangang, Li, Kezhi, Song, Qiang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2020
• Subjects: 3D graphene microtubes; Edge-rich vertical graphene nanosheets; Electromagnetic interference shielding; Flexible; Lightweight; Si3N4 nanowires; Electromagnetic interference shielding; Edge-rich vertical graphene nanosheets; 3D graphene microtubes; Si3N4 nanowires; Flexible; Lightweight
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2020.124025

•Lightweight and flexible 3D graphene microtubes membrane has been fabricated.•Interconnected edge-rich VGNs were grown on interwoven conductive CMTs networks.•The 3D GMTs membrane exhibits highly shows ultrahigh EMI shielding performance. Ultralight, flexible and high-performance electromagnetic-interference (EMI) shielding performance materials are urgently required in the areas of aircraft/aerospace, portable and wearable smart electronics. Benefiting from the outstanding properties of graphene and the unique architectures, 3D assembled graphene structures have been widely applied in the field of EMI-shielding. Herein, for the first time, using Si3N4 nanowires as self-sacrificial templates with the thermal decomposition characteristics, 3D graphene microtubes (3DGMTs) membrane is fabricated by plasma enhanced chemical vapor deposition (PECVD) method, exhibiting the characteristics of free-standing and flexibility. 3DGMTs membrane assembled with silicon carbide (SiC) nanocrystals decorated edge-rich vertical graphene nanosheets (VGNs) exhibits superb EMI shielding effectiveness (SE) of around 38 dB in the frequency range of 8.2~12.4 GHz at a density of 0.0036 g cm−3 and a thickness of 1.5 mm. Considering the ultralow density and thickness, 3DGMTs membrane shows a high specific SE (SSE, defined as SE divided by mass density) of 10,556 dB cm3 g−1 in X-band, which far surpasses that of almost all the reported materials. Remarkably, our work not only provides a new idea for preparation of hollow tubular carbon materials for a wide range of applications, but also presents some fundamental insights for edge-rich VGNs applied in EMI shielding.