▎ 摘　　要

Graphene is an important class of carbon-based materials that exhibits excellent thermal conductivity along its layers. In order to construct a 3D thermal transport material, herein, SiO2@C was successfully inserted into the reduced graphene oxide (rGO) layers to enhance its axial thermal transport performance via vacuum-assisted electrostatic self-assembly and pyrolysis processes. The formed rGO-SiO2@C composite exhibits an enhanced axial thermal conductivity of 6.65 W/(m*K) and an in-plane thermal conductivity of 36.54 W/(m*K). Moreover, it also displays good electromagnetic shielding properties, with the high total shielding effectiveness (SET) value of 45.59 dB, and an ultralow shielding effectiveness reflection (SER) value of 2.72 dB. Our work provides a simple method to construct a hybrid as a 3D conductive and thermal conductive network.