Researchers of the universities of Mainz and Siegen have developed novel molecular systems for storing solar energy.
As stated by the International Energy Agency (IEA), approximately 50 percent of global final energy consumption is dedicated to heating. Yet, the utilization of solar power in this sector remains relatively low compared to fossil energy sources. An inherent problem limiting the widespread usage of solar energy is the intermittency of its direct availability. A promising solution comes in the form of molecular solar energy storage systems. Conventional thermal energy storage strategies store the energy for short periods, e.g., in the form of hot water. In contrast, molecular solar energy storage systems store solar energy in the form of chemical bonds, allowing it to be preserved for several weeks or even months. These specialized molecules – or photoswitches – absorb solar energy and release it later as heat, on demand. However, a key challenge for current photoswitches is the trade-off between energy storage capacity and efficient absorption of solar light, limiting the overall performance. To overcome this issue, research teams at Johannes Gutenberg University Mainz (JGU) and the University of Siegen present a novel approach in a collaborative study. READ FULL ARTICLE