Graphene-carbon nanotube hybrid aerogel/polyethylene glycol phase change composite for thermal management

Abstract

A simple graphene-carbon nanotube aerogel composite was prepared. In this paper, we studied the three-dimensional (3 D) thermally conductive frameworks with different ratios of graphene oxide (GO) and carbon nanotubes (CNTs). The effects of 3 D thermal conductive frameworks with different ratios of GO and CNT on the morphology, structure and thermal conductivity of phase change composites were also studied. The results show that the 3 D thermally conductive framework has the advantages of managing the thermal conductivity of phase change composites. The obtained phase change composite with only 1 wt% of graphene-carbon nanotube aerogels showed top-quality thermal conductivity of 0.76 W/m·K. The preparation process was simple and has the advantage of environmental protection, so which was suitable for practical applications using polyethylene glycol/graphene-carbon nanotube aerogel phase change composite as energy materials, and has manageable energy conversion, storage and thermal conductivity properties.

Keywords:

• Graphene-carbon nanotube aerogel
• phase change composite
• synergy
• thermal conductivity

Additional information

Funding

This work was financially supported by NSAF of China [No. U1730114]; Scientific Research Fund of Sichuan Provincial Education Department [No.17TD0043] and Project of State Key Laboratory of Environmental-friendly Energy Materials [No.17kffk15, No.18fksy0220 and No.18kfhg09].