Abstract
The rapid development of high-performance materials has garnered considerable attention in addressing electromagnetic pollution. The construction of core-shell heterostructures is an effective approach for regulating the electromagnetic parameters of absorbers. However, these heterostructures usually lack a direct channel for charge transport between the core phase and the adhesive shell phase. Herein, Fe2AlB2@FeAl-layered double hydroxides with core-shell heterostructures were prepared using a top-down approach. The tightly connected FeAl-LDHs nanosheets to the Fe2AlB2 parent phase improved electronic transport. Compared with raw Fe2AlB2, the spherical absorber with an embroidered structure demonstrated stronger reflection loss (-15.6 dB for Fe2AlB2, −58.6 dB for Fe2AlB2@FeAl-LDHs) and a broader effective absorption bandwidth (2.2 GHz for Fe2AlB2, 3.6 GHz for Fe2AlB2@FeAl-LDHs) due to the enhanced dielectric and magnetic losses. This study presents a practical method for designing new controllable core-shell heterostructures for electromagnetic wave-absorbing materials.
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