Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

Highlights NiCo-LDHs successfully grow in situ on rod-like ZnO with unique structures.The interface of NiCo@C and rod-like ZnO result in interfacial polarization.The RLmin of NiCo@C/ZnO reaches − 60.97 dB with the EABmax of 6.08 GHz.The excellent performance comes from the effect of dielectric loss and magnetic loss. Supplementary Information The online version contains supplementary material available at 10.1007/s40820-021-00704-5.
Layered double hydroxides (LDHs) have a special structure and atom composition, which are expected to be an excellent electromagnetic wave (EMW) absorber. However, it is still a problem that obtaining excellent EMW-absorbing materials from LDHs. Herein, we designed heterostructure NiCo-LDHs@ZnO nanorod and then subsequent heat treating to derive NiCo@C/ZnO composites. Finally, with the synergy of excellent dielectric loss and magnetic loss, an outstanding absorption performance could be achieved with the reflection loss of − 60.97 dB at the matching thickness of 2.3 mm, and the widest absorption bandwidth of 6.08 GHz was realized at 2.0 mm. Moreover, this research work provides a reference for the development and utilization of LDHs materials in the field of microwave absorption materials and can also provide ideas for the design of layered structural absorbers. Supplementary Information The online version contains supplementary material available at 10.1007/s40820-021-00704-5.