Researchers at the University of Manchester have unveiled a groundbreaking approach to energy storage, drawing inspiration from the very process of sunburn. This innovative method utilises molecules capable of capturing and storing heat, a development that could prove pivotal in the UK's ambitious journey towards decarbonising its heating systems.
The science behind this discovery centres on molecules that react to light in a similar fashion to how melanin in human skin responds to ultraviolet (UV) radiation. When exposed to a specific light wavelength, these molecules undergo a structural change, absorbing and storing energy in the process. Crucially, this stored energy can then be released as heat on demand, offering a controllable and efficient way to manage thermal energy.
While the concept of storing thermal energy isn't new, the efficiency and reversibility of these newly developed molecules present a significant leap forward. Existing thermal storage solutions often involve materials that physically melt and solidify, or chemical reactions that are less controllable. The 'sunburn' inspired molecules, however, offer a precise mechanism for both absorption and release, making them highly versatile for various applications.
The implications for the UK are substantial, particularly given the country's reliance on natural gas for heating homes and businesses. Decarbonising heating is one of the most significant challenges in achieving net-zero emissions by 2050. Technologies like this could enable the capture of excess heat from renewable sources, such as solar thermal panels during summer, and store it for use during colder months, thereby reducing the need for fossil fuel combustion.
Furthermore, this research opens up possibilities for industrial processes that require high temperatures, currently often met by burning fossil fuels. By integrating these heat-storing molecules, industries could potentially reuse waste heat or utilise renewable heat sources more effectively, contributing to a broader reduction in carbon emissions across the economy. The findings, which have been peer-reviewed, build upon existing research into molecular energy storage, offering a more robust and practical solution.