Multifunctional Asymmetric Bilayer Aerogels for Highly Efficient Electromagnetic Interference Shielding with Ultrahigh Electromagnetic Wave Absorption

• The asymmetric bilayer MXene-graphene oxide (MG)-MXene aerogel achieves an ultrahigh electromagnetic wave absorption coefficient of 0.95 and maintains high EMI shielding effectiveness over 100 dB. • The design leverages absorption–reflection–reabsorption mechanisms and interference cancelation to achieve broadband absorption-dominated EMI shielding. • The multifunctional aerogel exhibits hydrophobicity, thermal insulation, Joule heating, solar-thermal/electric heating, infrared stealth, and efficient oil spill cleanup. • Finite element simulations confirm the effectiveness of the asymmetric bilayer structure for electromagnetic wave absorption.