Facile entropy engineering in LDH integrating GO/MXene composites for efficient electromagnetic waves absorption

High entropy materials (HEMs) have attracted extensive attention as a promising expectant for electromagnetic waves (EMWs) absorber due to the unique designability. However, the preparation of common HEMs generally requires complex processes, which hinders their further application. Herein, a facile approach is proposed for entropy engineering in layered double hydroxides (LDH) based composite towards EMWs absorption. Ternary (FeCoNi), quaternary (FeCoNiMn) and quinary (FeCoNiMnCr) LDHs integrating GO/MXene (GM@LE-LDHs, GM@ME-LDHs and GM@HE-LDHs) composites are successfully synthesized via a one-step hydrothermal method with modulated EMWs absorbing performance through facile entropy engineering. The GM@HE-LDH delivers a minimum reflection loss (RL min ) of −52.34 dB and a maximum effective bandwidth (EAB max ) of 5.01 GHz with less than 2 mm thickness, owing to the EMWs absorbing mechanism induced by the collaboration of entropy engineering on atomic scale and heterogeneous interface effects on nanoscale. This work provides a promising entropy engineering approach to prepare efficient EMWs absorber.