Elon Musk Podcast Google AI Powers new 100-Hour Rust Battery
10 snips
Feb 28, 2026 A deep dive into a 300 MW iron‑air battery promising up to 100 hours of storage and how it could keep AI data centers running. Discussion of pairing long‑duration storage with big new wind and solar builds. Coverage of manufacturing at a repurposed steel mill and local community reactions to large infrastructure siting.
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Lithium Ion Hits A Four Hour Wall
- Lithium-ion batteries are power-dense and fast but economically and chemically limited around four hours of duration.
- That four-hour ceiling can't bridge multi-day 'dunkelflaute' events, leaving renewables exposed during prolonged calm or overcast periods.
Reversible Rusting Is The Core Mechanism
- Form Energy's chemistry is reversible rusting using iron, water, and air to store and release energy.
- The battery 'breathes' oxygen in to discharge (rust) and breathes it out when recharged, reversing iron oxide to metallic iron.
Water Electrolyte Eliminates Fire Risk
- The electrolyte is water-based and non-flammable, eliminating thermal runaway risks common to lithium-ion installations.
- Modules are washer-sized with stacks of cells, making them safer and easier to permit than giant lithium banks.