MXene@Co hollow spheres structure boosts interfacial polarization for broadband electromagnetic wave absorption  

作　　者：Yan Zhang Xuehua Liu Zhiqiang Guo Chenyu Jia Feng Lu Zirui Jia Guanglei Wu 

机构地区：[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]Technical Center of Qingdao Customs,Qingdao 266002,China [3]College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China

出　　处：《Journal of Materials Science & Technology》2024年第9期167-175,共9页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51407134,52377026 and 52301192);the Natural Science Foundation of Shandong Province(No.ZR2019YQ24);the Taishan Scholars and Young Experts Program of Shandong Province(No.tsqn202103057);the Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural-Functional Polymer Composites);Special Financial of Shandong Province(Structural Design of High-efficiency Electromagnetic Wave-absorbing Composite Materials and Construction of Shandong Provincial Talent Teams).

摘　　要：MXene is considered as a candidate for preparing high-performance electromagnetic wave absorbing materials due to its large specific surface area,rich surface modification groups,and unique metal properties.However,the impedance matching problem caused by its high conductivity and easy stacking properties is a limiting factor.In this study,a self-assembling-etching-anchoring growth method was proposed to prepare MXene@Co electromagnetic wave absorbing materials.The hollow structure of MXene microspheres constructed with PMMA as a hard template is conducive to optimizing impedance matching and surface modification.In addition,MXene@Co exhibits abundant heterogeneous interfaces,enhancing the interfacial polarization phenomenon during electromagnetic wave absorption.Meanwhile,the surfaceanchored growth of magnetic Co particles forms a magnetic network,which provides a strong magnetic loss capability for the absorber.The hollow structure design significantly enhances the wave absorption performance compared to conventional MXene@Co composites,with a minimum reflection loss of−57.32 dB(effective absorption bandwidth of 5.2 GHz)when the thickness is 2.5 mm(2.2 mm).This work provides a meaningful reference for the design of MXene-based electromagnetic wave absorbing materials.

关 键 词：MXene@Co microspheres Hollow structure Impendance matching Electromagnetic wave absorption 

分 类 号：TB34[一般工业技术—材料科学与工程]