Iron-nitrogen-doped porous carbon absorbers constructed from hypercrosslinked ferrocene polymers for efficient electromagnetic wave absorption  

作　　者：Yi Hu Yijia Zhou Lijia Liu Qiang Wang Chunhong Zhang Hao Wei Yudan Wang 

机构地区：[1]Key Laboratory of Superlight Materials&Surface Technology of Ministry of Education,College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China [2]Yantai Research Institute of Harbin Engineering University,Yantai 264006,China [3]Qingdao Innovation and Development Base of Harbin Engineering University,Qingdao 266404,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2025年第3期578-590,共13页矿物冶金与材料学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.51803041);the University and Local Integration Development Project of Yantai,China(No.2022 XDRHXMXK08).

摘　　要：Herein,an external crosslinker facilitated the hypercrosslinking of ferrocene and a nitrogen heterocyclic compound(either melamine or imidazole)through a direct Friedel-Crafts reaction,which led to the formation of nitrogen-containing hypercrosslinked fer-rocene polymer precursors(HCP-FCs).Subsequent carbonization of these precursors results in the production of iron-nitrogen-doped por-ous carbon absorbers(Fe-NPCs).The Fe-NPCs demonstrate a porous structure comprising aggregated nanotubes and nanospheres.The porosity of this structure can be modulated by adjusting the iron and nitrogen contents to optimize impedance matching.The uniform dis-tribution of Fe-N_(x)C,N dipoles,andα-Fe within the carbon matrix can be ensured by using hypercrosslinked ferrocenes in constructing porous carbon,providing the absorber with numerous polarization sites and a conductive network.The electromagnetic wave absorption performance of the specially designed Fe-NPC-M_(2)absorbers is satisfactory,revealing a minimum reflection loss of-55.3 dB at 2.5 mm and an effective absorption bandwidth of 6.00 GHz at 2.0 mm.By utilizing hypercrosslinked polymers(HCPs)as precursors,a novel method for developing highly efficient carbon-based absorbing agents is introduced in this research.

关 键 词：hypercrosslinked polymers porous carbon iron-nitrogen doping annealing 

分 类 号：TB34[一般工业技术—材料科学与工程]