Phase-change materials undergo a phase transition near their phase-change temperature, which releases or absorbs a large amount of heat. This feature of phase-change materials can be used for energy storage or ambient temperature control purposes, and has application value in many fields. The nano-graphite phase change energy storage composites developed under the funding of Shanghai Young Science and Technology Star Program, National Natural Science Foundation of China and Shanghai Nanotechnology Special Project have the advantages of high energy storage density, excellent thermal conductivity and heat transfer, safety and stability, flame retardant and environmentally friendly. Compared with the existing phase change energy storage materials, the thermal conductivity of nano-graphite-based phase change energy storage composites has been improved by 1 to 2 orders of magnitude, the phase change temperature is continuously adjustable between -40 and +70°C, the energy storage density can reach 150-200J/g, and the degradation of performance is less than 5% after 1000 cycles. Phase change materials have a very wide range of applications, in building energy efficiency, modern agriculture greenhouse, solar energy, biomedical products and food refrigeration and transportation, physical medicine (heat therapy), electronic equipment, heat dissipation, athletes cooling (warm) clothing, special temperature control clothing, aerospace science and technology, military infrared camouflage, electric power peaking applications, industrial waste heat storage and utilization of a number of fields have obvious application value.
.