An efficient cooling solution with 3D interconnected graphene architectures for passive heat dissipation

Efficient passive cooling for miniaturized and integrated electronic devices could enhance device reliability with reduced energy consumption. The realization of this technology calls for highly efficient passive heat dissipation materials. In this work, we report a water-based acrylic resin (AR) mediated one-step electrochemical preparation of hybridized reduced graphene oxide membranes. Their well-defined porous structures are demonstrated to enhance the passive heat dissipation of traditional metal-based heat sinks. The 3D reduced graphene oxide membrane with 5% AR combines the efficient thermal radiation from graphene sheets and the AR-mediated cross-planar heat transfer. Outstanding heat dissipation performance was demonstrated by a cooling efficiency of 22% and a significant 31 °C reduction in working temperature for a high-power commercial LED. This work corroborates the potential of 3D hybridized reduced graphene oxide as a light, flexible, and effective cooling material for future thermal management applications.