Revolutionary Battery Technologies Promise to Transform Electric Vehicle Performance

Recent advancements in battery technology are poised to significantly enhance electric vehicle (EV) performance, addressing critical issues such as charging speed, range, and operation in extreme temperatures. Two notable developments include 24M Technologies' introduction of Eternalyte and the collaboration between Stellantis and Factorial Energy on solid-state batteries.

In June 2025, 24M Technologies unveiled Eternalyte, a novel battery electrolyte designed to improve EV battery performance. Key features of Eternalyte include:

• Enhanced Charging Speeds: Eternalyte enables charging up to four times faster than current EV batteries, potentially reducing charging times to under 15 minutes.
• Superior Cold-Weather Performance: The electrolyte maintains full capacity at 0°C and over 80% capacity at -40°C, addressing performance degradation in cold climates.
• Compatibility with Existing Infrastructure: Eternalyte can be integrated into existing battery types, including lithium metal, silicon, and graphite-based batteries, without necessitating changes to current manufacturing processes or charging infrastructure.

These advancements suggest that Eternalyte could facilitate the development of lithium metal batteries with ranges exceeding 1,000 miles, marking a significant leap in EV capabilities.

In April 2025, Stellantis and Factorial Energy announced the successful validation of automotive-sized solid-state battery cells utilizing Factorial's FEST® (Factorial Electrolyte System Technology). Highlights of this development include:

• High Energy Density: The 77Ah FEST® cells demonstrated an energy density of 375 Wh/kg, surpassing traditional lithium-ion batteries.
• Rapid Charging: These cells can charge from 15% to over 90% in just 18 minutes at room temperature.
• Temperature Resilience: The batteries operate effectively in temperatures ranging from -30°C to 45°C (-22°F to 113°F).
• High Power Output: The cells deliver high power with discharge rates up to 4C, supporting greater performance demands in EVs.

Stellantis plans to incorporate these solid-state batteries into a demonstration fleet by 2026, marking a significant step toward commercial use.

These advancements in battery technology have several potential implications:

• Accelerated EV Adoption: Improved charging speeds and extended ranges could alleviate consumer concerns, promoting wider adoption of electric vehicles.
• Infrastructure Impact: Compatibility with existing manufacturing processes and charging infrastructure may reduce the need for extensive upgrades, facilitating a smoother transition to advanced battery technologies.
• Environmental Benefits: Enhanced battery performance and efficiency contribute to reducing greenhouse gas emissions, aligning with global sustainability goals.

The advancements by 24M Technologies and the Stellantis-Factorial Energy collaboration represent significant strides in battery technology, addressing key challenges in the EV industry. As these innovations move toward commercialization, they hold the potential to revolutionize electric mobility, making EVs more accessible, efficient, and appealing to a broader audience.