Why Rust Batteries May Be the Future of Energy - Iron Air Battery Technology. Go to to sign up for free. And also, the first 200 people will get 20% off their annual premium membership. While renewable energy sources like solar and wind have now become cheaper than fossil fuels, developing long-term energy storage is key to overcome their intermittency. Lithium-ion batteries are the state-of-the-art battery technology but they can only cost-effectively provide energy for about 6 hours. So, what if we could extend the battery duration to 100 hours ... out of thin air … and rust? Literally! Watch Perovskite Solar Cells Could Be the Future of Energy: Video script and citations:
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