Abstract Phase change materials (PCMs), in light of high latent heat and isothermal performances during phase transition, behave huge potential in thermal management, and energy storage/conversion, yet still severely suffered from intrinsic unsatisfied thermal conductivity and inferior shape stability. Regarding to these bottlenecks, different from traditional complicated and energy-consuming methods, a facile strategy through merely physical mixing procedures was proposed for fabrication of PCMs with core-shell-like distribution of binary fillers composed of “core” containing polyethylene glycol (PEG) nanocomposites with graphene nanoplates (GNPs) and “shell” filled with hexagonal boron nitride (h-BN). Therefore, as-prepared composite achieves a thermal conductivity of 3.63 W·m−1 K−1 at GNPs/h-BN loading of 0.625 vol% and 15 vol%, respectively, almost 1.5-fold of that of composite counterpart with random filler distribution. Meanwhile, it also possesses high reserved latent heat and could maintain its original shape even at 90 °C, largely promoting its widespread applications.
Sen Xue, Chuxin Lei, Dingyao Liu
Composites Part A-applied Science and Manufacturing