Lowered Total Solidification Time and Increased Discharge Rate of Reduced Graphene Oxide-Solar Salt Composites: Potential for Deployment in Latent Heat Thermal Energy Storage System

•Reduced graphene oxide (rGO) prepared by chemical exfoliation.•rGO-solar salt composites prepared.•6% augmentation in specific heat with addition of rGO at 0.5 wt%.•49% reduction in total solidification time.•138% increase in discharge rate.