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Research Article

Multi-componential metal intercalated graphite hybrids synthesized by co-intercalation polymerization towards high-efficient microwave absorptions

Junhua Su1, Qinbo Ma1, Longkun Que1, Hunan Jiang1, Xiaoling Xu1,2, Yong Wang1,2, Yifan Guo1,2,3,4( ), Zuowan Zhou1,2,3,5
Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
School of Chemistry, Southwest Jiaotong University, Chengdu 610031, China
Yibin Research Institute, Southwest Jiaotong University, Yibin 644000, China
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Research Institute of Frontier Science, Southwest Jiaotong University, Chengdu 610031, China
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Graphical Abstract

We regulated the structures and components of FeNi@expanded graphite (EG) by co-intercalation polymerization and achieved multi-band microwave absorption.

Abstract

Magnetic expanded graphite (EG) hybrids were synthesized by co-intercalation polymerization of aniline together with transition metal ions. Experimental results show that metal ions (Fe, Co, Ni, and Cu) and even their mixtures can co-intercalate into graphite interlayers with flexibly controllable ratios and contents. Among these co-intercalation compounds, Fe/Ni-intercalated graphite with a predesigned mole ratio of 1:3 transforms into NiFe2O4/FeNi3@EG during the annealing process. The synthesized magnetic EG hybrids present multiband microwave absorption in C and X bands due to improved impedance match as well as significantly enhanced interfacial polarization relaxation induced by multi-componential metals. The reflection values of −39.1 dB at 6.95 GHz and −25.7 dB at 9.4 GHz are achieved with an ultra-low loading of 5 wt.%. This work provides a flexible approach for tuning the components and structures of magnetic EG hybrids, which may contribute to the development of microwave absorption materials with superior performances.

Keywords

co-intercalationintercalation polymerizationexpanded graphitetransition metalmicrowave absorption

Electronic Supplementary Material

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Nano Research
Volume 16 Issue 5,
May 2023
Pages 6369-6379
DOI: 10.1007/s12274-023-5483-7
Cite this article:
Su J, Ma Q, Que L, et al. Multi-componential metal intercalated graphite hybrids synthesized by co-intercalation polymerization towards high-efficient microwave absorptions. Nano Research, 2023, 16(5): 6369-6379. https://doi.org/10.1007/s12274-023-5483-7
Topics:
GraphiteMagnetic materials NanocompositesNanostructures

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Received: 18 August 2022
Revised: 07 December 2022
Accepted: 09 January 2023
Published: 19 February 2023
© Tsinghua University Press 2023
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