Fourth Power Nears Completion of Thermal Battery Prototype That Stores Grid Energy as White-Hot Heat in Liquid Tin
The MIT spinout plans to demonstrate a 1 MWh thermal battery in Bedford, Massachusetts this year, using graphite bricks heated to 2,400 degrees Celsius and liquid tin to deliver grid-scale storage at a claimed $25 per kilowatt-hour, a fraction of lithium-ion costs.
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