Abstract Although the heterostructured composites with micro/nanostructure have already been studied as potential microwave absorbers, it still remains a great challenge to achieve strong absorption and wide absorbing bandwidths. Herein, flower-like CoS hierarchitectures@polyaniline (PANI) organic-inorganic heterostructured composites were fabricated by a facile solvothermal approach and oxidative polymerization process. The incorporation of PANI into flower-like CoS microspheres not only improves the impedance matching, produces multiple reflections and scatterings, and causes conduction loss derived from PANI, but also creates more interfacial and dipolar polarizations, which results in increased dielectric loss. And more importantly, the synergy of CoS and PANI further improves the electromagnetic (EM) wave absorbing ability. Compared with the pristine CoS and PANI, the heterogeneous CoS@PANI composites demonstrate a strong EM absorption property with an optimal reflection loss (RL) of -54.1 dB at 11.4 GHz, and wide effective absorption bandwidth (EAB) of 5.3 GHz (RL

中文翻译：

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花状CoS hierarchitectures@聚苯胺有机-无机异质结构复合材料：制备和增强微波吸收性能

摘要 尽管具有微/纳米结构的异质结构复合材料已被研究作为潜在的微波吸收剂，但实现强吸收和宽吸收带宽仍然是一个巨大的挑战。在此，通过简便的溶剂热方法和氧化聚合工艺制备了花状 CoS 层次结构@聚苯胺（PANI）有机-无机异质结构复合材料。将 PANI 掺入花状 CoS 微球中不仅可以改善阻抗匹配，产生多次反射和散射，并导致 PANI 产生的传导损耗，而且还会产生更多的界面和偶极极化，从而导致介电损耗增加。更重要的是，CoS 和 PANI 的协同作用进一步提高了电磁 (EM) 波吸收能力。