Thermo-Conductive Phase Change Materials With Binary Fillers Of Core-Shell-Like Distribution

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.