Copper foam effectively improves the thermal performance of graphene-aerogel composite phase-change materials for thermal storage

Phase-change heat-storage technology is capable of solving problems associated with the mismatch between the supply and demand of heat energy. In this work, meso-erythritol/graphene-aerogel (mE/GA) and meso-erythritol/ graphene-aerogel/copper-foam (mE/GA/CF) composite phase-change materials (PCMs) were prepared by self reduction and vacuum-impregnation methods. Both experimental and simulation data show that, compared to mE/GA, the composite PCM augmented with CF more-effectively encapsulates the graphene-aerogel composite phase-change material (GACPCM), improving its shape stability and thermal properties, including its thermal stability, subcooling performance, enthalpy, and thermal conductivity. mE/GA/CF exhibits a thermal conductivity of 2.705 W m-1 K-1, which is nearly 13-times that of a common graphene-aerogel thermal-storage unit (GATSU), thus improving the usability of GATSU in the energy-conversion and storage field.

Automated summary

This study addresses the mismatch between the supply and demand of heat energy by using composite phase-change materials. By enhancing the composite PCM with copper foam, the thermal properties and shape stability of the graphene-aerogel composite phase-change material are improved, resulting in a significant increase in the thermal conductivity. This advancement enhances the usability of graphene-aerogel thermal-storage units in energy conversion and storage applications.