US ‘multi-day’ energy storage firm Form Energy closes US$405 million funding round
Form Energy, the US startup behind a battery technology that aims to cost-effectively provide 100-hour duration energy storage, has closed a Series F funding round. The company is working to commercialise a proprietary iron-air battery technology which works based on the reversible oxidisation (rusting) of iron as the battery discharges. The rust is converted back into iron through the application of electrical current as it charges.

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