Abstract: Barocaloric materials have attracted extensive attention for their promising applications in low-carbon refrigeration technology. Given that the performances of barocaloric materials are intrinsically and even inversely correlated, an overall trade-off is necessitated. Here, we have prepared the 1-bromoadamantane-graphene composite (15 wt.% graphene), whose pressure-induced entropy change, pressure-induced adiabatic temperature change, and thermal hysteresis nearly remain unchanged. The pressure-induced adiabatic temperature change is comparable to the prototype neopentylglycol while the thermal hysteresis is much smaller. More importantly, by incorporating the additive the thermal conductivity has been elevated by 10 times. Such a combination renders the composite state-of-the-art barocaloric performances and is expected to benefit the design of barocaloric refrigeration technology.

Key words: Plastic crystals, Phase transition, Barocaloric effect, Thermal conductivity