Stellantis and Factorial Energy have signed a joint development agreement to advance Factorial’s high-voltage traction solid-state battery technology.

The agreement also includes an unspecified investment from Stellantis.

“Our investment in Factorial and other recognised battery partners boosts the speed and agility needed to provide cutting-edge technology for our electric vehicle portfolio,” said Stellantis CEO Carlos Tavares.

“Initiatives like these will yield a faster time to market and more cost-effective transition to solid-state technology.”

Factorial has developed solid-state technology, which addresses issues such as driving range and safety.

For his part, Factorial Energy co-founder and CEO, Siyu Huang, added: “It is a great honour to partner with Stellantis, a leading global mobility player, which has some of the most iconic auto brands in the world.

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“It is an incredible opportunity for us to advance the adoption of our clean, efficient and safe solid-state battery technology to the mass market.”

Stellantis announced during its EV Day programme in July, 2021, its target of having the first competitive solid-state battery technology introduced by 2026.

Factorial’s advances are based on FEST (Factorial Electrolyte System Technology), which leverages a solid electrolyte material that enables cell performance with high-voltage and high-capacity electrodes and has been scaled in 40Ah cells that perform at room temperature.

Stellantis notes FEST is safer than conventional lithium-ion technology, extends driving range and is drop-in compatible for easy integration into existing lithium-ion battery manufacturing infrastructure.