TaON doped metal-organic frameworks-based composite phase change materials with excellent photo-thermal conversion performance

It is of great significance for designing prospective composite phase change materials (PCMs) with high shapestabilized property, good thermal conductivity and efficient energy storage and conversion capacity. This study successfully developed a novel composite PCMs that TaON nanoparticles doped polyethylene glycol/metalorganic frameworks (PEG/MOFs) using a convenient impregnation method. The inherent favorable thermal conductivity of HKUST-1 and the excellent visible light absorption ability of TaON endowed the composite PCMs with remarkably improved thermal conductivity (increased by 126.7% over pure PEG) and remarkable photothermal conversion ability (eta: 89.9-94.6%). Furthermore, the composite PCMs exhibited not only high shape stability, high thermal energy storage capacity (148.1 J/g) but also outstanding thermal stability and reliability. Accordingly, this novel photothermal composite PCMs would be hopefully applied to efficient storage, management and utilization for solar energy.

Automated summary

This study successfully developed a novel photothermal composite phase change material (PCM) with high thermal conductivity and photothermal conversion ability, suitable for efficient storage, management, and utilization of solar energy.