Fig. 2: Characterization of paraffin-graphene composite.
From: Accelerating the solar-thermal energy storage via inner-light supplying with optical waveguide

a SEM image of the surface morphology of paraffin-graphene composite. b Transmittance spectra of paraffin-graphene composites with a thickness of 1 mm in the range of 300 to 2500 nm spectra. c DSC curves of pure paraffin and paraffin-graphene composites with different loading of graphene. d Comparison of fusion phase-change enthalpy, melting and solidification temperatures of pure paraffin and paraffin-graphene composites.