Researchers at the San Diego Supercomputer Center have utilized the Expanse supercomputer to design sodium-based batteries for large-scale energy storage, which could serve as a reliable backup for solar and wind power. By studying the battery's cathode and testing the addition of lithium and titanium, scientists aim to enhance performance and create batteries capable of delivering sufficient power over numerous charge-discharge cycles. The abundance and affordability of sodium make it a promising option for sustainable energy solutions, highlighting the potential for advancements in renewable energy technology.