Ultralight MXene/rGO aerogel frames with component and structure controlled electromagnetic wave absorption by direct ink writing

Highly conductive MXene has attracted extensive focus owing to its notable ability for electromagnetic wave dissipation, but it also suffers from impedance mismatch. Herein, flexibly MXene/rGO aerogel frames (MGs) were construct by direct ink writing (DIW) of low concentration emulsion inks. Adjustment of compositional ratio and structural design could effectively regulate their EWA performances. The results indicate that the printed aerogel frame has an effective absorption bandwidth (EAB) of 8.10 GHz (covering the majority of X-band and entire Ku-band) and a minimum reflection loss (RL min ) of −56.85 dB. In addition, the printed ultralight aerogel frames integrate good mechanical performance and thermal insulation capability. The DIW technique for ultralight MXene-based absorber reveals beneficial inspiration and enlightenment for the structural design and potential application of EMA composites.