Bioinspired Superlight Carbon Nanotube Aerogel With Exceptionally High Kinetic Energy Absorption up to 385.47 MJ/m ³

High‐performance kinetic energy absorption and electromagnetic shielding materials are critical for key technological applications in aerospace, electronic communications, and transportation systems. However, it's still a great challenge to increase kinetic energy absorption while maintaining an ultra‐low density. Herein, a silver‐functionalized carbon nanotube aerogel (ACNTA) is designed by simulating the internal structure of bamboo through the segmented deposition of carbon nanotube aerogel (CNTA) with silver, where the macro‐porous CNTA backbone introducies intrinsic low density and large deformation, and the adhesion of Ag increases the skid resistance and conductivity between carbon nanotube fibers. Consequently, a superlight ACNTA with an extremely low density of 9.3 mg cm −3 is obtained, exhibiting a remarkable kinetic energy absorption of 385.47 MJ m −3 at a strain rate of 8500 s −1 . Additionally, the electromagnetic shielding performance of ACNTA reached 99.65 dB, an increase of 22% compared to the native CNTA. Moreover, the aerogel designed with a bionic bamboo structure also has certain thermal insulation, sound absorption, and noise reduction performance. The biomimetic‐designed structure provides the potential for superlight materials with multifunctional properties for outer protective materials for electronic and equipment.