Thermal Insulation Materials: Graphene-Based Ultralight Compartmentalized Isotropic Foams with an Extremely Low Thermal Conductivity of 5.75 mW m−1 K−1 (Adv. Funct. Mater. 5/2021)

In article number 2007392, Pil J. Yoo, Min Jun Oh, and Je Hyun Lee report graphene-based ultralight foams for thermal insulation. Through the close-packed integration of thin microbubbles of graphene, entirely non-directional and closed cellular structures (CCS) are created. These isotropic CCS foams exhibit extremely low thermal conductivity (5.75 mW m−1 K−1) thanks to the efficient suppression of solid and gas conduction in heat transport.