Carbonized Wood Loaded with Carbon Dots for Preparation Long-Term Shape-Stabilized Composite Phase Change Materials with Superior Thermal Energy Conversion Capacity

2021 ◽  
Author(s):  
Xinghui Li ◽  
Ziqi Zhu ◽  
Pei Yang ◽  
Zhenping You ◽  
Yue Dong ◽  
...  
Keyword(s):  
Phase Change ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Carbon Dots ◽  
Phase Change Materials ◽  
Thermal Energy Conversion ◽  
Composite Phase Change Materials ◽  
Carbonized Wood

scholarly journals Efficient Solar-to-Thermal Energy Conversion and Storage with High-Thermal-Conductivity and Form-Stabilized Phase Change Composite Based on Wood-Derived Scaffolds

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1283 ◽  
Author(s):  
Bolin Chen ◽  
Meng Han ◽  
Bowei Zhang ◽  
Gaoyuan Ouyang ◽  
Behrouz Shafei ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Phase Change ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Thermal Conversion ◽  
Solar Irradiation ◽  
Thermal Energy Conversion ◽  
Energy Conversion And Storage ◽  
Graphite Coating ◽  
Carbonized Wood

Solar-to-thermal energy conversion is one of the most efficient ways to harvest solar energy. In this study, a novel phase change composite with porous carbon monolith derived from natural wood is fabricated to harvest solar irradiation and store it as thermal energy. Organic phase change material n-octadecane is physically adsorbed inside the porous structure of the carbonized wood, and a thin graphite coating encapsulates the exterior of the wood structure to further prevent n-octadecane leakage. The carbonized wood scaffold and the graphite coating not only stabilize the form of the n-octadecane during phase change, but also enhance its thermal conductivity by 143% while retaining 87% of its latent heat. Under 1-sun irradiation, the composite achieves an apparent 97% solar-to-thermal conversion efficiency.

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