Long-duration energy storage using iron oxide
Renewable energy from solar and wind is produced when the sun shines or the wind blows, not necessarily when electricity is needed. This creates a growing need for large-scale, low-cost energy storage to balance supply and demand over longer periods, including across seasons. Iron Energy develops a storage technology that converts surplus electricity into hydrogen and stores it in iron. The hydrogen reduces iron oxide to metallic iron, allowing energy to be stored safely and cheaply. When electricity is needed again, the iron is oxidized with steam, producing hydrogen that can be converted back into electricity.