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 Yi Hu;Yiijia Zhou;Lijia Liu;Qiang Wang;Chunhong Zhang;Hao Wei;Yudan Wang

作者机构：Key Laboratory of Superlight Materials&Surface Technology of Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Yantai Research Institute of Harbin Engineering UniversityYantai 264006China Qingdao Innovation and Development Base of Harbin Engineering UniversityQingdao 266404China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报(英文版))

年 卷 期：2025年第32卷第3期

页      面：578-590页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

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) 

主　　题：hypercrosslinked polymers porous carbon iron-nitrogen doping annealing 

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 *** porosity of this structure can be modulated by adjusting the iron and nitrogen contents to optimize impedance *** 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 *** 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 *** utilizing hypercrosslinked polymers(HCPs)as precursors,a novel method for developing highly efficient carbon-based absorbing agents is introduced in this research.