“…In addition, PCMs generally have the disadvantages of poor thermal conductivity, low energy storage/release efficiency, and a heat transfer unit that is too large, which leads to a larger temperature gradient inside the PCM during the working process, increasing the energy loss of heat transfer and hindering the application of PCMs in thermal energy storage. A wide range of approaches have been applied to enhance the heat transfer performance of PCMs, including dispersing particles [12][13][14], adding fins [15,16], metal foam [17][18][19], composite methods [20,21], and more, which have proven that adding high thermal conductivity materials in various forms improves the heat transfer performance of the PCMs to a certain extent. After optimizing their performance, PCMs will have wider application prospects in the fields of building energy conservation, waste heat recovery, thermal protection of electronic devices, solar power plants, and so forth.…”