Molecular solar battery stores energy for days, yields hydrogen on demand
Why it matters: This breakthrough offers flexible, on-demand hydrogen production, crucial for integrating variable renewables into heavy industry.
- Ulm University and Friedrich Schiller University Jena developed a molecular solar battery that stores photovoltaic energy and generates hydrogen on demand.
- The system's core is a water-soluble copolymer, acting as both an electron storage medium and a photocatalytic platform, achieving over 80% charging efficiency.
- This approach decouples solar generation from hydrogen production, allowing hydrogen to be generated in darkness at 72% conversion efficiency, unlike conventional systems.
- The system is chemically reversible, enabling multiple charge, storage, and discharge cycles with simple pH adjustments for regeneration.
- The research, part of the CataLight consortium, integrates macromolecular chemistry and photocatalysis to support low-cost, scalable hydrogen storage for industrial applications like steelmaking.
Researchers from Ulm University and Friedrich Schiller University Jena have developed a groundbreaking molecular solar battery that stores solar energy for days and then releases it as hydrogen on demand, even in the dark. This innovative system, detailed in Nature Communications, uses a water-soluble copolymer to decouple solar generation from hydrogen production, offering unprecedented flexibility and efficiency for chemical energy storage.
