WOBURN, Mass., December 13, 2024 — Factorial Energy, a leading innovator in solid-state battery technology, has successfully scaled its first Solstice™ all-solid-state battery cells to a 40Ah capacity, a significant advancement in its development efforts for electric vehicle (EV) applications. These A-sample cells, developed in collaboration with Mercedes-Benz, showcase the company’s commitment to next-generation battery technology and highlight the increasing importance of scalability and energy density in the race to electrify mobility.
The 40Ah Solstice™ cells utilize Factorial’s proprietary dry cathode coating process, a novel manufacturing technique that eliminates hazardous solvents traditionally used in battery production. This new approach is not only more sustainable but also significantly more energy-efficient and cost-effective compared to conventional methods. By eliminating the need for energy-intensive formation processes, Factorial’s cells help reduce both operating costs and the environmental impact of battery production.
A Step Forward in Solid-State Battery Technology
Factorial Energy, supported by major automotive partners including Mercedes-Benz, Stellantis, and Hyundai-Kia, has been at the forefront of developing solid-state batteries with higher energy densities, enhanced safety, and longer lifecycles. The company’s Solstice™ cells are expected to play a pivotal role in shaping the future of electric vehicles and other applications, including energy storage and consumer electronics.
In previous tests, Factorial delivered B-sample cells to Mercedes-Benz, which were reported to have an energy density of 391Wh/kg, though the exact measurement at the cell or pack level remains unspecified. More recently, in September, the company revealed that the Solstice™ cells could achieve an impressive energy density of up to 450Wh/kg. The scaling to a 40Ah capacity marks another milestone in Factorial’s quest to provide battery solutions that offer an 80% increase in range for electric vehicles, further advancing the adoption of EVs worldwide.
“Breakthrough solid-state battery performance is only relevant if it can be scaled to a size that is viable for commercial use,” said Dr. Siyu Huang, Co-Founder and CEO of Factorial Energy. “This achievement underscores our team’s technical leadership and unmatched expertise in bringing innovative battery technologies to the high standards of the automotive sector. At 40Ah capacity, our all-solid-state Solstice™ cells demonstrate the technical maturity, process validation, and scalability required for commercial applications.”
Innovative Dry Coating Technology: A Game-Changer in Battery Manufacturing
Factorial’s dry cathode coating process is a key factor in the scalability and environmental benefits of the Solstice™ cells. Traditional battery manufacturing processes rely heavily on liquid solvents for cathode coating, which can be both carcinogenic and energy-intensive to manage. Factorial’s dry process eliminates these solvents, making the manufacturing process safer, more efficient, and significantly less impactful on the environment.
Additionally, the company’s all-solid-state cell design eliminates the need for the formation process, typically one of the most energy-consuming steps in battery manufacturing. This combination of innovations positions Factorial Energy as a leader in sustainable and cost-effective battery production methods.
“We are leading the charge in advancing this novel manufacturing process for larger-sized cells, a challenge that the rest of the market is still grappling with,” said Alex Yu, Co-Founder and CTO of Factorial Energy. “The dry coating process allows us to improve cell performance, reduce lead times, and lower production costs, which is crucial as we scale up to meet the growing demand for electric mobility solutions.”
Progress Towards Commercialization
The successful scaling of the Solstice™ cells to 40Ah capacity is an important step toward bringing these batteries to commercial markets. Factorial Energy is already working on ramping up production at its new development and production facility in Massachusetts, which opened in October 2023. With a capacity of 200MWh, this is currently the largest production line for solid-state batteries in the United States.
The 40Ah Solstice™ cells will undergo further lifecycle testing, with smaller prototypes already having surpassed 2,000 charge cycles, demonstrating their potential for long-term use in electric vehicles and other applications. The company is also working closely with Mercedes-Benz, Stellantis, and Hyundai-Kia to integrate its solid-state battery technology into their future EV platforms.
Factorial’s innovative Factorial Electrolyte System Technology (FEST®), which features a lithium metal anode and polymer separator, forms the basis of the Solstice™ cells. This technology allows for the production of batteries on existing lithium-ion battery production lines, making it easier for manufacturers to transition to solid-state technology without needing entirely new production infrastructure.
A Bright Future for Electric Mobility
Factorial Energy’s efforts are poised to transform the electric vehicle industry by delivering batteries that offer higher energy density, improved safety, and longer lifespans. With the growing demand for EVs and the push for more sustainable and efficient energy storage solutions, Factorial’s Solstice™ solid-state batteries are well-positioned to lead the next generation of electric mobility.
The company’s work with Mercedes-Benz to develop Solstice™ batteries is expected to play a crucial role in the global adoption of electric vehicles, with the potential to drive significant advancements in range, charging times, and overall vehicle performance. Additionally, the scalability of the technology is expected to benefit a wide range of industries beyond automotive, including energy storage and consumer electronics.
“We are incredibly proud of our team’s ability to innovate and push the boundaries of what’s possible in battery technology,” said Dr. Huang. “Our Solstice™ cells are just the beginning of what we believe will be a transformative shift in the way we think about energy storage and electric mobility.”
Conclusion
The successful scaling of Factorial Energy’s Solstice™ solid-state battery cells to 40Ah capacity is a significant milestone in the company’s ongoing efforts to revolutionize the battery industry. With its innovative dry cathode coating process and advanced all-solid-state technology, Factorial is setting new standards for energy density, cost-effectiveness, and sustainability in battery production.
As the company continues to collaborate with major automotive partners and scale its production capabilities, the future of electric mobility looks increasingly promising, with Factorial Energy at the forefront of this technological evolution.
