High-performance absorbing material with FeCo-MOF pyrolysis-derived microspheres embedded on the surface of multilayer carbon magnetic heterostructure carbon fibers

MOF (metal-organic framework) materials have recently demonstrated significant promise in the area of outstanding durability absorption materials because of their lightweight characteristics, high porosity, and stable structure after pyrolysis. Building on our previous research, this study innovatively designed a method using the unique double-sided modification of PDA to induce stable self-assembly of MOFs on the surface of most materials, such as carbon fibers. Using this method, this study presents the fabrication of a composite absorption material with a unique microstructure: a FeCo-MOF-derived microsphere/N-doped carbon/SCF composite. Notably, the FeCo-MOF-derived microspheres are tightly integrated with nitrogen-containing carbon coatings in an inlay form, thereby constructing an efficient synergistic loss system on the carbon fiber surface. Based on the test results, the new structure strongly enhances the ability of composite resources to absorb electromagnetic waves, achieving a wide effective absorption frequency band of 4.25 GHz where the reflection loss was -57.7 dB with a consistent layer thickness of 2.3 mm.