Advanced solid–solid phase change thermal storage material

The practicality of conventional solid–liquid phase change materials (PCMs) is adversely restricted by liquid phase leakage, large volume expansion, shape instability, and severe corrosion in high-temperature thermal management systems. This highlight presents the latest development to resolve these challenges by designing ultrahigh-performance high-temperature Ni-Mn-Ti solid–solid PCMs using martensitic phase transition strategy, offering a new paradigm to develop advanced wide-temperature high-temperature metallic solid–solid phase change thermal storage materials.