Energy density is twice that of LFP! Major breakthrough in US Factorial Energy's solid-state battery [SMM analysis]

US solid-state battery startup Factorial Energy and global automotive giant Stellantis recently announced a significant breakthrough in their jointly developed large-scale solid-state battery cells using FEST (Factorial Electrolyte System Technology). The energy density of these battery cells reaches 375Wh/kg, nearly double that of traditional LFP batteries.

The battery can be charged from 15% to 90% within 18 minutes and operates stably within a temperature range of -30°C to 45°C, challenging the traditional perception of poor lithium battery performance under low-temperature conditions. Stellantis plans to be the first to apply this battery in its vehicles by 2026, aiming to reshape the battery market landscape currently dominated by Asian companies.

The core of Factorial's breakthrough technology lies in its innovative sulphide-based all-solid-state electrolyte material, Solstice™. Unlike the liquid electrolytes used in traditional lithium-ion batteries, this solid-state electrolyte not only enhances energy density but also significantly reduces the risk of fire. An industry expert stated that if this technology can be commercialized, it will reshape the competitive landscape of the EV industry.

The FEST technology adopts an innovative dry coating process, eliminating the use of harmful solvents and high-energy-consuming steps in traditional battery manufacturing, making production more environmentally friendly and potentially reducing costs. Factorial can produce these solid-state batteries with minimal modifications to its existing lithium-ion battery production lines, indicating significant potential for large-scale production.

Factorial aims to develop a battery that is both safe and high-performance while maintaining compatibility with existing manufacturing infrastructure. Currently, the technology has successfully passed over 600 charge-discharge cycle tests, proving its stability and durability.

For consumers, this technology promises EVs with longer driving ranges, shorter charging times, and higher safety. Under current technological conditions, an EV equipped with a 90kWh FEST battery can theoretically travel 966 kilometers, with a weight and volume reduction of approximately 30% compared to traditional lithium-ion battery packs.

Stellantis invested $75 million in Factorial in 2021 and plans to launch demonstration vehicles equipped with solid-state batteries by 2026, possibly including the highly anticipated Dodge Charger Daytona electric sports car. Stellantis hopes to gain an edge in competition with rivals such as BYD, Tesla, and CATL through this innovation, breaking the long-standing market dominance of Asian battery giants.

SMM Analysis:

Although solid-state batteries offer excellent performance, enhanced safety, and higher energy density, they still face numerous challenges in transitioning from technological validation to large-scale commercialization. Currently, the global solid-state battery sector is highly competitive. As a startup, Factorial may still need time to match the capabilities of industry giants such as Toyota, CATL, and BYD.

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