Startup Says Molten Silicon Will Make Lithium-Ion Storage ‘Uneconomic.’ Here’s the Full Story

By [email protected] One of the companies bidding for a 100-megawatt storage plant in South Australia is standing by claims that its technology could beat lithium-ion.

Adelaide-based 1414 Degrees, named after silicon’s melting point (and formerly known as Latent Heat Storage), claims to have developed a molten silicon thermal energy storage system (TESS) that can store 500 kilowatt-hours of energy within a 70-centimeter cube.

This is 36 times the capacity of a 14-kilowatt-hour Tesla Powerwall 2 lithium-ion battery, the company claims. 1414 Degrees says it could build a 10 megawatt-hour plant for around AUD $700,000 (USD $528,000), or a tenth of the price of

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