Sensible heat storage is the most mature and widely deployed technology for both large-scale industrial and residential applications. The energy stored is proportional to the material's specific heat capacity and the temperature difference achieved. The approach to this particular chemistry problem is called molecular solar thermal (MOST) energy storage. Solar thermal collectors are classified by the United States Energy Information Administration as low-, medium-. The concept of thermal energy storage (TES) can be traced back to early 19th century, with the invention of the ice box to prevent butter from melting (Thomas Moore, An Essay on the Most Eligible Construction of Ice-Houses, Baltimore: Bonsal and Niles, 1803). Modern TES development began with. In a paper published in the journal Science, Associate Professor Grace Han and her team detail a new material that captures sunlight, stores it within chemical bonds and releases it as heat on demand. The material, a modified organic molecule called pyrimidone, is the latest advancement in. Thermal storage technologies have the potential to provide large capacity, long-duration storage to enable high penetrations of intermittent renewable energy, flexible energy generation for conventional baseload sources, and seasonal energy needs.