材料科学
电磁干扰
电磁屏蔽
电磁干扰
石墨
热导率
纳米晶材料
光电子学
复合材料
干扰(通信)
数码产品
纳米技术
电子工程
电气工程
计算机科学
电信
频道(广播)
工程类
作者
Mingyi Tan,Daming Chen,Yuan Cheng,Huiqi Sun,Guiqing Chen,Shun Dong,Guangdong Zhao,Xinghong Zhang,Shiqi Wu,Wenzheng Zhang,Jiecai Han,Wenbo Han,Xinghong Zhang
标识
DOI:10.1002/adfm.202202057
摘要
Abstract The rapid development of next‐generation portable electronic devices urgently requires dual‐functional materials that possess both efficient heat dissipation and outstanding electromagnetic interference (EMI) shielding performances. In this study, anisotropically oriented carbon films with high thermal conductivity and excellent EMI shielding properties are prepared through an innovative glucose hydrogel‐controllable carbonization method. The horizontal alignment of nanocrystalline graphite results in oriented structures with an extremely high in‐plane thermal conductivity of 439.9 W m −1 K −1 , exhibiting a more effective heat‐dissipating capacity on smartphones than their commercial graphite counterparts. Additionally, owing to multiple internal reflections arising from the oriented structures, the films exhibit an EMI shielding effectiveness (SE) of 21.72 dB at an ultrathin thickness of 480 nm in the X‐band and an extraordinarily high absolute shielding effectiveness (SSE/ t ) of 275 883 dB cm 2 g −1 , significantly outperforming most of the reported synthetic materials. Furthermore, the flexibility, high mechanical strength, and stability of the films are demonstrated and therefore show promising application prospects. This study offers a facile yet feasible strategy for preparing dual‐functional materials to address the heat emission and EMI problems of advanced electronic devices in a more economical and environmentally friendly manner.
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