Carbonate-salt-based composite materials for medium- and high-temperature thermal energy storage

Research output: Contribution to journalArticlepeer-review


  • Zhiwei Ge
  • Feng Ye
  • Guanghui Leng
  • Yue Qin

Colleges, School and Institutes


This paper discusses composite materials based on inorganic salts for medium- and high-temperature thermal energy storage application. The composites consist of a phase change material (PCM), a ceramic material, and a high thermal conductivity material. The ceramic material forms a microstructural skeleton for encapsulation of the PCM and structural stability of the composites; the high thermal conductivity material enhances the overall thermal conductivity of the composites. Using a eutectic salt of lithium and sodium carbonates as the PCM, magnesium oxide as the ceramic skeleton, and either graphite flakes or carbon nanotubes as the thermal conductivity enhancer, we produced composites with good physical and chemical stability and high thermal conductivity. We found that the wettability of the molten salt on the ceramic and carbon materials significantly affects the microstructure of the composites.


Original languageEnglish
Pages (from-to)77-81
Early online date5 Nov 2013
Publication statusPublished - Aug 2014


  • Thermal energy storage, Composite materials, Microstructure, Thermal conductivity, Phase change material