Journal
JOURNAL OF ENERGY STORAGE
Volume 36, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2021.102428
Keywords
Light-to-heat conversion; Carboxylic multi-walled carbon nanotubes; Phase change materials; Silicon dioxide; Solar energy storage
Categories
Funding
- State Key National Natural Science Foundation of China [21536002]
- Science Fund for Creative Research Groups of the National Natural Science Foundation of China [21421005]
- Liaoning Revitalization Talent Program
- Dalian University of Technology (Dalian University Technology Innovative Team) [DUT19TD28]
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The developed light-induced phase change materials (PCMs) exhibit improved thermal conductivity, high energy storage density, good stability and durability, making them suitable for efficient utilization of solar energy.
The development of light-to-heat energy conversion and storage materials with high thermal conductivity and stability is very helpful to overcome limitations of using solar energy. Herein, novel light-induced phase change materials (PCMs) were synthesized by sol-gel method using polyethylene glycol (PEG) as phase change material, silicon dioxide (SiO2) network with aminopropyl group and carboxylic multi-walled carbon nanotubes (MWCNTs-COOH) as supporting material (SAM). The developed PEG/SAM have many advantages, including improved thermal conductivities (43.5-108.7% increase as compared to PEG), high energy storage densities (116-133 J/g), high light-to-heat energy conversion and storage efficiency (85.8-88.3%), and good form-stable performance. Moreover, the PEG/SAM maintained excellent chemical stability and thermal performance durability after 500-cycle thermal experiments and 200 cycles light-induced phase transitions. Thus, the developed light-to-heat energy conversion and storage PCMs have the potential for many applications and the efficient utilisation of solar energy.
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