Nacre-inspired conductive carbon nanotube-intercalated graphite nanoplatelet network as multifunctional thermal management materials

Multifunctional thermal management materials applied for human body or electronic devices with high energy density have gradually drawn tremendous interest of researchers due to the advent of 5G era. In this study, inspired by the multiscale nacre structure, carbon nanotubes were intercalated into the oriented graphite nanoplatelets (GNPs) to construct conductive networks via a facile and green self-assembly approach. The prepared composite film exhibited high in-plane thermal conductivities because of the orientation of GNP layers, which was conducive to the phonon transport. Due to the abundant electrically conductive network, the electrothermal and electromagnetic interference (EMI) shielding performances were realized, delivering a remarkable electrothermal performance (140 °C under an external voltage of 4 V) and an intriguing specific electromagneticinterference shielding effectiveness (2537 dB cm−1).