Synthesis of C/NiFe-LDH composites for enhanced electromagnetic wave absorption

Hydrotalcites are layered double metal hydroxides (LDH) that are widely used in many fields, owing to their large specific surface area, rich interface, and stable structure. Of these, NiFe-LDH is the most typical material used in the field of electromagnetic wave absorption. In this study, NiFe-LDH was synthesized by hydrothermal synthesis and subjected to liquid-phase shearing with graphite to synthesize the composite material C/NiFe-LDH. The results show that C/NiFe-LDH displays a strong electromagnetic wave absorption capacity, with a maximum reflection loss of − 51.8 dB at a thickness of 3.5 mm. The maximum effective absorption bandwidth is 4 GHz (10.8–14.8 GHz). Therefore, C/NiFe-LDH is expected to become a candidate material for efficient electromagnetic wave absorption.