A phase-change material (PCM) is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy. Heat is absorbed or released when the material changes from solid to liquid and vice versa; thus, PCMs are classified as latent heat storage (LHS) units.
Read more about Phase-change Material: Characteristics and Classification, Selection Criteria, Thermophysical Properties of Selected PCMs, Technology, Development and Encapsulation, Thermal Composites, Applications, Fire and Safety Issues
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“Would it not be worth while to discover nature in Milton? be native to the universe? I, too, love Concord best, but I am glad when I discover, in oceans and wildernesses far away, the material of a million Concords: indeed, I am lost, unless I discover them.”
—Henry David Thoreau (1817–1862)