Assembling of low-dimensional aggregates with interlaminar electromagnetic synergy network for high-efficient microwave absorption  

作　　者：Fei Pan Xiaofen Wu Dan Batalu Wei Lu Hongtao Guan 

机构地区：[1]School of Materials and Energy,Yunnan University,Kunming 650091,China [2]Shanghai Key Lab.of D&A for Metal-Functional Materials,School of Materials Science&Engineering,Tongji University,Shanghai 201804,China [3]Materials Science and Engineering Faculty,Politehnica University of Bucharest,Bucharest,060042,Romania

出　　处：《Advanced Powder Materials》2023年第2期82-91,共10页先进粉体材料（英文）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2019YFE0122900);the National Natural Science Foundation of China(No 22165032,51971162,U1933112,51671146);China Postdoctoral Science Foundation(Grant No.2020M671208).

摘　　要：Considering the risk of a sudden degeneration caused by the oxidation of MXenes in dielectric and microwave absorption properties,to enhance the oxidation resistance of multilayer MXenes can make them more applicable as microwave absorbers than those with few-layer.However,there remains disadvantage in optimizing the poor impedance matching and inherent aggregation of multilayer MXenes via rational assembling.In the present study,a facile self-assembly process is conducted to obtain 2D MXenes/1D MnO_(2)/0D NiCo_(2)S_(4) assembled lowdimensional aggregate with hierarchical structure and interlaminar electromagnetic synergy network.In addition to bridging adjacent MXenes lamellas for the enhancement of internal electron transport,high-density MnO2 can also combine with NiCo2S4 to form an electromagnetic synergy network between lamellas,thus improving microwave attenuation.Though the modulation of components and assembled structures,it is achievable to effectively adjust and optimize the performance in impedance matching and microwave absorption.Given the thickness of 2.17 mm,the optimal reflection loss of59.23 dB,and the effective absorption bandwidth of 5.8 GHz are achieved.Moreover,the RCS simulations is performed to demonstrate its excellent performance.Thus,the present work contributes a facile method to the development of multi-layer MXenes based-MAs via interlaminar electromagnetic network design.

关 键 词：Microwave absorption Ti_(3)C_(2)T_(x)MXenes MnO_(2) Low-dimensional aggregates Interlaminar electromagnetic synergy 

分 类 号：O62[理学—有机化学]