A few months ago, Factorial Energy had introduced the first 40 Ah solid-state battery (SSB) cell for electric vehicles and other applications. And recently, they had reported a 97.3 % capacity retention rate at 675 cycles after testing their SSB's cell cycle behavior at 25 °C.

Factorial's 40 Ah Solid-state batteries are based on the Factorial Electrolyte System Technology (FEST) - a proprietary solid electrolyte material that enables safe & reliable cell performance with high-voltage and high-energy density electrodes. FEST is safer than conventional lithium-ion technology, replacing the combustible liquid electrolyte with a safer and more stable solid-state electrolyte that suppresses lithium dendrite formation on lithium-metal anodes. Liquid electrolytes could compromise safety if the battery package fails to satisfy the design challenges put forth by its thermal and electrical properties. A solid electrolyte overcomes this by reducing such risks and provides more energy density within a similar battery package.

Battery platforms based on FEST yield 20-50 % improvements in driving range without sacrificing pack longevity, and surpass prevailing EV battery performance standards, including those for energy density, cycle life, and safety. Factorial also said that its SSBs can be easily integrated into the existing lithium-ion battery manufacturing infrastructure. Several major global automotive partners are already validating Factorial's technology with the intent of integrating FEST into their existing supply chains.

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