**Startup Building Zinc-Based Alternatives to Lithium Batteries Granted $400M Loan from the US**

Popular Science reports that America's Department of Energy "is providing a nearly $400 million loan to a startup aimed at scaling the manufacturing and deployment of a zinc-based alternative to rechargeable lithium batteries."

 If realized, Eos Energy's utility- and industrial-scale zinc-bromine battery energy storage system could provide cheaper, vastly more sustainable options for the country's burgeoning renewable power infrastructure... Unlike lithium-ion and lithium iron phosphate batteries, alternatives such as the Eos Z3 design rely on zinc-based cathodes alongside a water-based electrolyte, notes MIT Technology Review. This important distinction both increases their stability, as well as makes it incredibly difficult for them to support combustion. Zinc-bromine batteries meanwhile also boast lifespans as long as 20 years, while existing lithium options only manage between 10 and 15 years. What's more, zinc is considered the world's fourth most produced metal...

The U.S. Department of Energy also notes that "over time," Eos expects to source almost all of its materials within the U.S., thus better insulating its product against the market volatility and supply chain issues. While the Department of Energy previously issued similar loans to battery recycling and geothermal energy projects, last week's announcement marks the first funding offered to a manufacturer of lithium-battery alternatives.

MIT's article notes that Eos's semi-autonomous facility in Pennsylvania already produces around 540 megawatt-hours annually — and it isn't operating at full capacity. This new loan could boost factory toward full-power. The $398-million loan funds "up to four state-of-the-art production lines," according to the announcement from the U.S. Energy Department.

It notes that the technology is "specifically designed for long-duration grid-scale stationary battery storage that can assist in meeting the energy grids' growing demand with increasing amounts of renewable energy penetration."
If finalized, the project is expected to manufacture 8 GWh of storage capacity annually by 2026. That is enough to provide electricity to over 300,000 average U.S. homes instantaneously or meet the annual electricity needs of approximately 130,000 homes if fully charged and discharged daily. The project is expected to create up to 50 union contractor construction jobs and as many as 650 new operations jobs when at full operational capacity...

Critically, Eos batteries are non-flammable and do not require active cooling to operate. The batteries can achieve 100% depth of discharge...

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