Abstract
Subtle microstructure design and an appropriate multicomponent strategy are essential for advanced electromagnetic absorbing(EMA)materials with a wide effective absorption bandwidth(EAB)and intense absorption.However,sophisticated environments restrict the range of applications for EMA materials.Herein,three hollow spherical bifunctional CoSx/MnS/C nanocomposites with different crystal structures were constructed via cation exchange and subsequent vulcanization.The manganese sulfide and carbon generated during vulcanization exhibit a narrow band gap and enhanced conductivity,thereby facilitating conductive loss.The presence of cobalt sulfide facilitates the improvement of magnetic loss.More impor-tantly,there is a potential difference between different phases at the heterogeneous interface,resulting in a region of space charge,which is conducive to interfacial polarization.The 3D hollow structure and heterogeneous dielectric/magnetic interfaces benefit the predominant EMA performance by forming per-fect impedance matching,interface polarization,conduction loss,and magnetic loss effects.Specifically,an optimal reflection loss(RL)of-51.31 dB at 10.72 GHz and an effective EAB of 5.92 GHz at 2.1 mm can be achieved for Co1-xS/MnS/C nanocomposite.Moreover,the nanocomposites maintained promising self-anticorrosion properties in simulated seawater environments.Transition metal sulfides with supe-rior self-anticorrosion properties provide a pathway to efficient wave-absorbing materials in complicated environments.
基金项目
National Natural Science Foundation of China(52377026)
National Natural Science Foundation of China(52301192)
Natural Science Foundation of Shandong Province(ZR2019YQ24)
Taishan Scholars and Young Experts Program of Shandong Province(tsqn202103057)
Qingchuang Talents Induction Program of Shandong Higher Education Institution()
Special Financial of Shandong Province()
the"Sanqin Scholars"Innovation Teams Project of Shaanxi Province()
NETL
NSTL
万方数据