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Sun Battery Stores Energy Chemically
15 May
Summary
- New molecule stores solar energy in chemical bonds for later release.
- Material offers higher energy density than lithium-ion batteries.
- Stored sunlight can be used to boil water for practical applications.
Scientists have engineered a revolutionary material capable of absorbing sunlight and storing its energy in chemical bonds, offering a potential solution for renewable energy storage challenges. This molecular solar thermal (MOST) technology utilizes a modified organic molecule, pyrimidone, inspired by DNA's structure.
The synthesized molecule functions like a rechargeable "sun battery." After absorbing solar energy, it shifts to a high-energy state and remains stable. When triggered, it releases the stored energy as heat, a process that can be repeated. This innovative material boasts an energy density exceeding 1.6 megajoules per kilogram, outperforming conventional lithium-ion batteries.
A significant achievement for the research team was demonstrating the material's capacity to release enough heat to boil water under ambient conditions. This advancement opens doors for practical applications such as off-grid heating systems and domestic water heating.
The technology's potential includes circulating the material through rooftop collectors, storing it, and then releasing heat as needed, effectively decoupling energy collection from usage. This method bypasses the need for separate large-scale battery systems typically associated with solar energy.
