In this PCM, polyethylene glycol (PEG) has been taken as functional branches, with which the energy storage and energy release can be proceeded by phase transition between its crystal state and amorphous state.

• 利用聚乙二醇从结晶态到无定形态之间的转变，实现该材料的储能和释能，整个过程中材料始终保持为固体。