 Abstract layered double hydroxide, LDH, materials have unique atomic structures and compositions that make them ideal candidates for electromagnetic wave, EMW, absorption. However, these materials often lack the ability to absorb EMWs due to their poor dielectric properties. In this study, we developed N-I-Co-LDHS at ZN-O nanorods and subsequently treated them with heat to create N-I-Co at sea, slash ZN-O composites. The resulting material exhibited excellent EMW absorption characteristics with a reflection loss of minus 60.97 dB at a thickness of 2.3 mm and a wide band absorption range of 6 GHz at a thickness of 2 mm. This study demonstrates the potential of LDHs as EMW absorbers and provides a basis for further research into the development of novel materials for EMW absorption applications. This article was authored by Jianwei Wang, Zhewei Jia, Xuohua Lu, and others.