Factorial launches second generation sulfide all solid state battery
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Factorial in the US has introduced its second generation full solid state sulfide battery that is set to be used in Mercedes cars.
The Solstice all-solid-state battery was developed by Factorial and Mercedes-Benz with an energy density of up to 450Wh/kg using a novel dry cathode coating process to reduce costs.
“The Solstice solid-state battery technology represents another landmark milestone in our partnership with Factorial, which is a cornerstone of Mercedes-Benz’s strategy and commitment to leading the charge in battery development,” said Markus Schäfer, Chief Technology Officer and Member of the Board of Management at Mercedes-Benz Group AG. “Solstice offers further improvements in energy density and safety features that will help us develop electric vehicles that set new standards in range, cost, and performance.”
Factorial expects the Solstice technology to be introduced by OEMs before the end of the decade, reducing vehicle weight and increasing vehicle efficiency to boost range. The sulfide-based all-solid-state electrolyte system addresses safety concerns associated with more flammable and volatile liquid electrolyte designs, targeting a EUCAR safety rating of 2 and maintaining stability at operating temperatures over 90°C. This also has the potential to reduce the cooling system requirements within the battery pack to lower overall vehicle cost.
“Solstice embodies our team’s technology leadership and the potential of solid-state batteries to address the most significant hurdles for electric vehicle adoption,” said Siyu Huang, CEO and Co-Founder of Factorial. “Solstice not only will enhance the range and performance of electric vehicles but also aligns with our vision for a more sustainable future. We’re grateful to have Mercedes-Benz’s continued support, which underscores our ability to meet the needs of global automakers now and in the future.”
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The dry coating process eliminates the need for hazardous solvents and energy-intensive steps commonly used in traditional cathode production. The technology also bypasses the formation process, the most energy-consuming stage of lithium-ion battery manufacturing. This reduces operating costs, energy consumption, and environmental impact, paving the way for a more sustainable future for battery production.
Factorial has shipped B-samples of its solid-state cells using its Factorial Electrolyte System Technology (FEST) technology to Mercedes following a joint development agreement in 2021 and $200m investment in 2022. This paves the way for Solstice and the next generation of EVs says Factorial.
As well as Mercedes, the company has established joint development agreements with Stellantis, Hyundai and Kia.
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