Enhanced light-to-thermal conversion performance of all-carbon aerogels based form-stable phase change material composites.
The exploitation of excellent performance form-stable phase change material composites (FS-PCMCs) with enhanced photothermal conversion efficiency and high phase change latent heat is of great significance for thermal energy storage. In this work, a new type of FS-PCMCs with superior light-to-thermal conversion performance were created by impregnation of organic phase change material (1-hexadecylamine (HDA) and 1-tetradecylamine (TDA)) into the graphene aerogel (GA) and all-carbon aerogel (GCA) through a simple direct infusion. The multiwalled carbon nanotubes (MWCNTs) are wound around the inner wall of the GA layer to form a three-dimensional (3D) porous network structure to support fatty amine (FAs), thus achieving shape stability before and after phase transition. Moreover, the FS-PCMCs has extremely high phase transition enthalpy (203.1-248 kJ·kg-1) and good recyclability. More importantly, due to the high absorbance of GCA, it can enhance its light absorption capacity and reduce thermal radiation. The light-to-thermal conversion efficiency of the FS-PCMCs is 72.36%-88.25%. Taking the improvement of the comprehensive properties of the FS-PCMCs, the results of this work may open up a way for rational design and preparation of high-performance FS-PCMCs with enhanced storage capacity and light-to-thermal conversion efficiency for the efficient utilization of solar energy.
['Wang|Chengjun|C|', 'Wang|Linqiang|L|', 'Liang|Weidong|W|', 'Liu|Fang|F|', 'Wang|Shuo|S|', 'Sun|Hanxue|H|', 'Zhu|Zhaoqi|Z|', 'Li|An|A|']
D006108:Graphite D006358:Hot Temperature D037742:Nanotubes, Carbon D044367:Phase Transition D016062:Porosity
Light-to-thermal All-carbon aerogel Phase change material Thermal energy storage Fatty amine