Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (3): 1016-1024.doi: 10.19799/j.cnki.2095-4239.2021.0007

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Research progress of sodium sulfate decahydrate phase changematerial

Caimei YU(), Xuelai ZHANG(), Weisan HUA   

  1. Shanghai Maritime University, 201306, Shanghai, China
  • Received:2021-01-05 Revised:2021-01-07 Online:2021-05-05 Published:2021-04-30
  • Contact: Xuelai ZHANG E-mail:ycm1929@126.com;xlzhang@shmtu.edu.cn

Abstract:

Sodium sulfate decahydrate is a popular inorganic hydrated salt phase change material because of its suitable phase change temperature (32.4 ℃), high latent heat of phase change value (>200 J/g), low price, wide source, safety and non-toxicity. However, there are problems such as large subcooling, severe phase separation and leakage in the application process. This paper reviews the research progress in recent years to solve the above problems, the preparation of eutectic salt phase change materials and related applications, and makes the following outlook on the subsequent research directions: in terms of reducing the subcooling degree, use of borax, preparation of eutectic salts or addition of external field perturbation to improve subcooling; in terms of suppressing phase separation, highly thermally conductive porous materials can be used to adsorb phase change materials, and the method of preparing stereotyped phase change materials by vacuum impregnation can be used to improve or eliminate the phase separation phenomenon; in terms of eutectic salt materials, binary phase diagrams can be drawn to find new eutectic phase change materials for research, especially organic phase change materials that are currently less combined; in terms of applications, focus on researching and broadening the scope of application in conjunction with sodium decahydrate sulfate phase change energy storage devices and systems.

Key words: sodium sulfate decahydrate, supercooling, phase separation, form-stable phase-change materials, eutectic salt

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