In situ growth of CoNi bimetallic alloys inside polyetheretherketone-derived hierarchical porous carbon as a broadband and efficient electromagnetic wave absorber

Pan Xu; Lingcheng Meng; Hongru He; Desheng Qi; Shan Wang; Jiyong Fang; Xigui Yue

doi:10.1039/D2DT03239B

In situ growth of CoNi bimetallic alloys inside polyetheretherketone-derived hierarchical porous carbon as a broadband and efficient electromagnetic wave absorber†

Pan Xu,^a Lingcheng Meng,^a Hongru He,^a Desheng Qi,^a Shan Wang,^a Jiyong Fang

*^b and Xigui Yue

*^a

Author affiliations

* Corresponding authors

^a Key Laboratory of High Performance Plastics, Ministry of Education, National and Local Joint Engineering Laboratory for Synthetic Technology of High Performance Polymer, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
E-mail: yuexigui@jlu.edu.cn

^b Midea Corporate Research Center, Foshan 528311, P. R. China
E-mail: fangjiyong1989@foxmail.com

Abstract

Both morphological structure and chemical composition are the important factors that determine the electromagnetic wave (EMW) absorption properties of EMW absorbers. Herein, hierarchical porous carbon (HPPC) was synthesized by using polyetheretherketone (PEEK) as the starting material via the salt template method combined with KOH activation. Then, taking advantage of the hierarchical porous characteristics of the carbon, a novel EMW absorber (HPPC/CoNi) was synthesized by in situ growth of CoNi bimetallic alloys inside the above porous carbon. The as-synthesized HPPC/CoNi exhibits excellent EMW absorption performance with a minimum reflection loss (RL_min) value of −65.56 dB at 2.00 mm and a maximum effective absorption bandwidth (EAB) of 5.92 GHz at 1.80 mm. The superior EMW absorption property is ascribable to the multiple reflection/scattering induced by the hierarchical porous structure of HPPC, dielectric loss, magnetic loss, and good impedance matching. The results show that HPPC/CoNi is a potential EMW absorber with characteristics of ultra-light weight, ultrathin thickness, broad bandwidth, and strong absorption.

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DOI: https://doi.org/10.1039/D2DT03239B
Article type: Paper
Submitted: 07 Oct 2022
Accepted: 20 Oct 2022
First published: 20 Oct 2022

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Dalton Trans., 2022,51, 17430-17440

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In situ growth of CoNi bimetallic alloys inside polyetheretherketone-derived hierarchical porous carbon as a broadband and efficient electromagnetic wave absorber

P. Xu, L. Meng, H. He, D. Qi, S. Wang, J. Fang and X. Yue, Dalton Trans., 2022, 51, 17430 DOI: 10.1039/D2DT03239B

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In situ growth of CoNi bimetallic alloys inside polyetheretherketone-derived hierarchical porous carbon as a broadband and efficient electromagnetic wave absorber†

Abstract

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In situ growth of CoNi bimetallic alloys inside polyetheretherketone-derived hierarchical porous carbon as a broadband and efficient electromagnetic wave absorber

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