Critics often claim that solid-state batteries are perpetually five years away from becoming a reality. However, this timeline has now been reduced to just two years, particularly as more companies are venturing into this technology. Stellantis is the latest to join the fray; the company has announced that it will equip a test fleet of Dodge Charger Daytona EVs with solid-state batteries from its partner Factorial by 2026. This marks one of the first public uses of the technology in automobiles, albeit in prototype form.

Solid-state batteries differ from conventional lithium-ion batteries by replacing the liquid electrolyte with a solid substance, allowing for the use of more potent anode materials. This innovation results in significantly higher energy densities compared to current battery technologies. For instance, Factorial claims that its cells can achieve up to 390 watt-hours per kilogram, whereas GM's large pouch cells, which are similar in form to Factorial's, can achieve around 280 wh/kg.

Factorial is at the forefront of solid-state cell development, alongside other American companies such as QuantumScape, which has partnerships with Volkswagen, and Solid Power, which has agreements with Ford and BMW. While most major solid-state battery companies have sent numerous sample cells to their partners, Stellantis' announcement is the first time an automaker has formally committed to showcasing prototypes using this technology. Solid Power has claimed that BMW is assembling a demonstration vehicle featuring its cells, but there has been minimal news from the German automaker on this matter.

Stellantis has provided limited details about the battery packs that will be used in the experimental Dodge Charger Daytonas. However, it is known that Factorial produces 100 amp-hour cells, which it has supplied to its partner automakers. These batteries are likely to be used in the experimental cars.

It's worth noting that Mercedes-Benz has also recently invested in Factorial. The Stuttgart-based automaker may soon make a similar announcement. Until then, Dodge's new electric muscle car will be the first widely-publicized production prototype to be powered by this exciting new battery technology.

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