材料科学
反射损耗
石墨
微波食品加热
吸收(声学)
复合材料
阻抗匹配
石墨烯
多孔性
微观结构
制作
导电体
偶极子
光电子学
复合数
纳米技术
电阻抗
电信
计算机科学
医学
病理
工程类
有机化学
化学
电气工程
替代医学
作者
Zhicheng Liu,Fei Pan,Baiwen Deng,Zhen Xiang,Wei Lü
出处
期刊:Carbon
[Elsevier]
日期:2021-04-01
卷期号:174: 59-69
被引量:123
标识
DOI:10.1016/j.carbon.2020.12.019
摘要
In this work, the 3D worm-like expanded graphite (EG)/2D MoS2 nanosheets hybrids were synthesized by a facile in-situ self-assembled hydrothermal process. The 2D MoS2 nanosheets were uniformly and vertically grown on the surface of the 3D worm-like graphite, and interconnected with each other to form a hierarchical network structure. The unique honeycomb-like porous microstructure of the worm-like EG was conducive to the multiple scatterings and reflections, interconnected conductive network and improved impedance matching. In addition, the abundant heterogeneous interfaces in the MoS2/EG hybrids lead to enhanced dipole polarization and interfacial polarization. As a result, the MoS2/EG hybrids exhibited high-efficiency electromagnetic wave (EMW) absorption performance with an ultra-low filling ratio of 7 wt %. The MoS2/EG composites displayed an optimal reflection loss (RL) value of −52.3 dB at 15.1 GHz and a wide effective absorption bandwidth (EAB) of 4.1 GHz with a thickness of only 1.6 mm. The present work provides a significant guidance for the design and fabrication of the ultra-lightweight EMW absorbers with high performances.
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