Journal
JOURNAL OF ENERGY STORAGE
Volume 54, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2022.105238
Keywords
Nano-Ag; Loofah-based porous carbon; Thermal conductivity; Photo-thermal conversion; Thermal stability
Categories
Funding
- Natural Science Founda- tion of China [52165047]
- Natural Science Foundation of Jiangxi Province [20192ACB21021]
- Outstanding Young talents funding of Jiangxi Province [20192BCB23002]
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Composite phase change materials consisting of loofah-based porous carbon modified with nano-Ag particles were prepared in this study. The addition of nano-Ag particles significantly improved the thermal conductivity and photo-thermal conversion efficiency of the composite phase change material. Furthermore, the material exhibited excellent thermal stability and reusability.
Composite phase change materials have been extensively researched and applied in the field of thermal energy storage management and photo-thermal conversion. In this research, the loofah-based porous carbon (BPC) was modified with nano-Ag particles through chemical reduction method, and then a novel polyethylene glycol (PEG)/modified bio-based loofah porous carbon (BPC-Ag) shape-stable composite phase change material (SSPCM) was prepared. The experimental results indicated that the addition of nano-Ag particles not only considerably improved the thermal conductivity of the PEG/BPC-Ag composite PCMs (from 0.349 W m(-1) K-1 to 0.632 W m(-1) K-1) compared to the PEG/BPC composite PCMs, but also significantly improved its photo-thermal conversion efficiency (from 76.8 % to 92.3 %). In addition, the PEG/BPC-Ag has excellent thermal stability and reusability, which exhibited favorable phase change performance even after 100 thermal cycles. The results showed that the PEG/BPC-Ag has broad application prospects in the fields of photo-thermal conversion and thermal energy storage management.
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