Introduction of Phase Change Material into Sustainable Carbon Materials for Enhanced Shape Stability and Thermal Conductivity

Abstract

New sustainable carbon materials were synthesized from a low‐price and eco‐friendly carrot via hydrothermal reaction and carbonization approach. Afterwards, palmitic acid (PA) was impregnated into the carrot‐derived carbon material (CCM) to prepare PA@CCM composites through vacuum impregnation method. The thermal properties and shape stability of PA@CCM composites were evaluated by differential scanning calorimetry (DSC), thermal conductivity and thermal cycling tests. Owing to the special hybrid microstructure of the CCMs, the loading ratio of PA in PA@CCM composites could reach up to 85.3 % with the latent heat of 166.4 J g−1. More importantly, the PA@CCM composites show negligible leakage above the melting point of PA, exhibiting excellent shape stability. Compared with pristine PA, the thermal conductivity of PA@CCM composites could greatly enhanced by 145.5 %. Thus, PA@CCM composites can be considered as a promising candidate for thermal energy storage applications.

Nano‐Ag modified bio‐based shape‐stable phase change material for thermal energy storage

“…However, their development has been greatly restricted because of the disadvantages of non‐degradability, non‐regeneration, toxicity, and high cost 44 . However, biologically derived porous carbonaceous materials with natural porosity structures are distinguished by their durability, non‐toxic, simple preparation process, and cost‐effectiveness, such as corn cob, 45 potatoes, 41 eggplants, 42 and carrots 46 . For example, Li et al 47 produced hierarchical porous carbon from wood and evaluated it as the supporting material for PEG.…”

“…44 However, biologically derived porous carbonaceous materials with natural porosity structures are distinguished by their durability, non-toxic, simple preparation process, and cost-effectiveness, such as corn cob, 45 potatoes, 41 eggplants, 42 and carrots. 46 For example, Li et al 47 produced hierarchical porous carbon from wood and evaluated it as the supporting material for PEG. This formstable phase change material demonstrated has highefficiency light-to-thermal and excellent energy storage density, so it has a good application prospect for thermal energy harvesting.…”