Scientists have developed molecules capable of capturing and storing heat using a technology known as molecular solar-thermal energy storage [1].
This development matters because it offers a potential pathway to decarbonize heating systems. By storing solar heat for later use, the technology could reduce reliance on fossil fuels for residential and industrial warming [1, 3].
The technology is based on the chemistry of sunburn [1, 2]. When certain molecules are exposed to sunlight, they undergo a chemical transformation that allows them to hold onto energy. This process mimics the way skin reacts to ultraviolet radiation, though it is engineered for energy retention rather than biological damage [2, 3].
These specialized molecules can capture solar energy and hold it in a stable state for extended periods [1]. When the stored heat is needed, a catalyst or specific trigger releases the energy as heat, which can then be used for various applications [3].
Researchers are focusing on how these molecules can be integrated into existing infrastructure to make heating more sustainable [1]. The ability to store thermal energy, rather than converting it to electricity first, could increase the efficiency of solar energy utilization [3].
While the technology is currently in the development phase, the goal is to create a scalable system that allows homeowners and businesses to harvest summer sun for winter warmth [1, 2]. This would address one of the primary challenges of solar power: the intermittent nature of sunlight across different seasons [1].
“The technology could help decarbonise heating by providing a way to store solar heat for later use.”
The shift toward molecular solar-thermal (MOST) energy storage represents a move away from traditional battery-based electrical storage toward direct thermal management. If scalable, this could decouple heat production from real-time energy generation, allowing for seasonal energy shifting that reduces the carbon footprint of heating infrastructure.
