Nickel-coated wood-derived porous carbon (Ni/WPC) for efficient electromagnetic interference shielding

Compositing magnetic loss materials on biomass materials have been evolved as an effective pathway to satisfy the requirement of lightweight and high shielding effectiveness of electromagnetic functional materials. Here, a core–shell-like Ni-coated wood-derived porous carbon composite (Ni/WPC) with anisotropic porous architecture was demonstrated. The three-dimensional WPC structures not only act as the dielectric loss part but also establish a multiple scattering route to eliminate the incident EMW. The nickel-coated shells could serve as the magnetic loss part and meanwhile construct the interfacial polarization through the heterogeneous structures with the WPC skeleton. As a result, an excellent EMI shielding effectiveness of 34.1 dB with a thickness of 2 mm can be realized in Ni/WPC-30 at the X band. Additionally, the Ni/WPC composite possesses an extraordinary flame retardant property, exhibiting excellent service adaptability and which can be extended to other applications. Graphic Abstract