Abstract: In one aspect, compositions are described herein which include a first phase change material (PCM) component comprising an organic PCM, a second PCM component comprising an inorganic PCM, and a crosslinker linking the first PCM component to the second PCM component. In another aspect, a thermal energy storage system is described herein which comprises a container, a heat exchanger disposed within the container, and a composition described herein disposed within the container. The heat exchanger and the composition of such thermal energy storage systems are in thermal contact with one another.

Abstract: In one aspect, temperature control sheets are described herein. In some embodiments, such a sheet comprises a first film; a second film facing opposition to the first film; and a phase change material (PCM) component disposed in between the first film and the second film. The sheet comprises one or more PCM-containing zones in a lateral plane of the sheet and also comprises one or more PCM-free fold or cut zones or lines in the lateral plane of the sheet.

Abstract: In one aspect, thermal energy storage compositions are described herein. In some embodiments, a composition comprises 0.5-10 wt. % polysaccharide and 88-99.5 wt. % water, wherein the weight percentages are based on the total weight of the composition. Moreover, in some cases, the composition is shape stable at 20° C. and 1 atm.