材料科学
电磁屏蔽
电磁干扰
电磁干扰
石墨烯
蜂巢
数码产品
柔性电子器件
光电子学
纳米技术
复合材料
蜂窝结构
电气工程
计算机科学
电信
工程类
作者
Jiandong Xu,Ruisong Li,Shourui Ji,Baozhi Zhao,Tianrui Cui,Xichao Tan,Guangyang Gou,Jinming Jian,Haokai Xu,Yancong Qiao,Yi Yang,Sheng Zhang,Tian‐Ling Ren
出处
期刊:ACS Nano
[American Chemical Society]
日期:2021-04-21
卷期号:15 (5): 8907-8918
被引量:105
标识
DOI:10.1021/acsnano.1c01552
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 μm. The single-piece HPG exhibits an ultrahigh absolute shielding effectiveness (SSE/t) of 240 123 dB cm2/g with an ultralow density of 0.0388 g/cm3, 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 cm2/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 ease of mass production, which is promising for practical applications in EMI shielding and wearable electronics.
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