MATÉRIAUX COMPOSITES À CHANGEMENT DE PHASE COMPORTANT DES SUPPORTS ACTIFS POUR DES APPLICATIONS DE STOCKAGE D'ÉNERGIE THERMIQUE

The invention relates to a composite phase-change material (PCM) comprising a non-polymeric solid-solid PCM and a solid-liquid PCM, wherein the solid-liquid PCM occupies an internal volume of the solid-solid PCM. This material takes full advantage of the latent heat of both PCMs, while avoiding seepage of the inner solid-liquid PCM. A method for the preparation of these materials is also within the scope of the invention as well as its use and applications. The invention further relates to a thermal energy storage device comprising the composite PCM.