材料科学技术(英文版)2024，Vol.173Issue(6) ：170-180.DOI:10.1016/j.jmst.2023.06.066

Inimitable 3D pyrolytic branched hollow architecture with multi-scale conductive network for microwave absorption

Jiajun Li Qianqian Zhu Jiahui Zhu Yuhang Cheng Zirui Jia Feng Lu Chao Wang Guanglei Wu
材料科学技术(英文版)2024，Vol.173Issue(6) ：170-180.DOI:10.1016/j.jmst.2023.06.066
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Inimitable 3D pyrolytic branched hollow architecture with multi-scale conductive network for microwave absorption

Jiajun Li 1Qianqian Zhu 2Jiahui Zhu 1Yuhang Cheng 1Zirui Jia 2Feng Lu 3Chao Wang 1Guanglei Wu1
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作者信息

  • 1. Institute of Materials for Energy and Environment,State Key Laboratory of Bio-fibers and Eco-textiles,College of Materials Science and Engineering,Qingdao University,Qingdao,266071,China
  • 2. College of Chemistry and Chemical Engineering,Qingdao University,Qingdao,266071,China
  • 3. Technical Center of Qingdao Customs,Qingdao,266002,China
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Abstract

To solve the electromagnetic pollution problem,the reasonable structure design and component control of the electromagnetic absorber is prominent.In this work,three-dimensional(3D)pyrolytic branched hollow architecture carbon PBHAC/MoS2 composites were prepared via a hydrothermal and calcina-tion two-step strategy.The narrow-gap nano-size MoS2 acquired after vulcanization and micro-size 3D branched carbon skeleton PBHAC possess intensified conduction losses.Particularly,the presence of po-tential differences between different phases creates a space charge region at the heterogeneous interface,resulting in strong interfacial polarization.The resulting 3D branched hollow PBHAC/MoS2 composites exhibit optimized impedance matching and multiple loss mechanisms.Finally,the 3D branched hollow carbon PBHAC/MoS2 composites have the best electromagnetic wave(EMW)absorption performance.The minimum reflection loss(RLmin)is-57.8 dB at 1.93 mm and the maximum effective absorption bandwidth(EABmax)is 6.08 GHz at 2 mm,which indicates the excellent EMW absorption performance of the com-posites.Accordingly,this composite is expected to be a microwave absorber with the characteristics of"thin,light,wide,and strong".

Key words

Dielectric loss/MoS2/Impedance matching/Schottky barrier/Microwave absorption

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基金项目

National Natural Science Foundation of China(52377026)

National Natural Science Foundation of China(N52301192)

National Natural Science Foundation of China(52002196)

Natural Science Foundation of Shandong Province(ZR2019YQ24)

Natural Science Foundation of Shandong Province(ZR2020QF084)

Taishan Scholars and Young Experts Program of Shandong Province(tsqn202103057)

Qingchuang Talents Induction Program of Shandong Higher Education Institution()

Special Financial of Shandong Province(37000022P990304116449)

出版年

2024
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
参考文献量80
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