Dielectric-magnetic integrated absorbers have attracted arousing attention in microwave absorption,how-ever,it still remains a great challenge to simultaneously achieve superior dielectric polarization and strong magnetic loss.Herein,we propose a multi-scale structure optimization strategy to anchor CoNi-MOFs derived OD CoNi alloy onto 1D core-shell Ni@C surface.By decorating with the poly-dopamine layer,the connection between 1D NiO and CoNi-MOFs precursors was greatly improved via the electro-static interaction.Benefiting from the overlapping conductive networks,enhanced interfacial polarization among the multi-dimensional heterogeneous interfaces and strong magnetic interaction,the fabricated multi-dimensional Ni@C-CoNi composites exhibit outstanding microwave absorption.Typically,the opti-mal reflection loss is as high as-51.4 dB at 1.9 mm,and the effective absorption bandwidth achieves 4.6 GHz with a thickness of only 1.3 mm.This multi-scale structure optimization strategy inspires us with an efficient method to fabricate ideal microwave absorbers and the obtained multi-dimensional composites can be used as promising candidates in electromagnetic radiation protection.

Mengxiao Sun;Derong Wang;Ziming Xiong;Zhongwei Zhang;Long Qin;Chaochan Chen;Fan Wu;Panbo Liu

School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing 210094,China;State Key Laboratory of Disaster Prevention&Mitigation of Explosion&Impact,Army Engineering University of PLA,Nanjing 210007,China;Division of Electron and Electricity Measurement Technology,Shanghai Institute of Measurement and Testing Technology,Shanghai 201203,China;School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an 710129,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China

材料科学技术（英文版）

[1]Mengxiao Sun;Derong Wang;Ziming Xiong;Zhongwei Zhang;Long Qin;Chaochan Chen;Fan Wu;Panbo Liu-.Multi-dimensional Ni@C-CoNi composites with strong magnetic interaction toward superior microwave absorption)[J].材料科学技术（英文版）,2022(35):176-183

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