Investigation on thermal properties of heat storage composites containing carbon fibers

We prepared a series of thermal performance-enhanced heat storage composite phase change materials containing carbon fibers. It revealed that the composites have reduced both melting point and latent heat capacity with an increase in the mass fraction of the carbon fibers (CF) or mechano-chemical treated CF (M-CF). Composites have enhanced thermal conductivities compared to palmitic acid (PA), with the enhancement ratios increasing with the mass fraction of additives. M-CF/PA enhances more thermal conductivity than CF/PA does when they contain the same additives and are at the same temperature. Thermal conductivity enhancement of 0.5 wt. % M-CF/PA is 239.2% in liquid state, compared with PA.