24M Technologies announced it has expanded its portfolio of Eternalyte electrolytes that significantly improve today’s batteries’ charge rate and cold temperature performance.
Initially unveiled in 2024 and designed for lithium metal batteries, the new enhanced offering is ideal for silicon and graphite-based batteries used in applications that require high power and low-temperature performance with outstanding rapid charge rates and longevity.
24M’s Eternalyte is a revolutionary new electrolyte that delivers high-rate capability and can be seamlessly integrated into existing manufacturing processes to enhance battery performance and achieve superior safety.
This breakthrough technology offers immediate improvements for various applications, especially electric vehicles (EVs) and electronics, where consumers demand a peak combination of performance and value.
Benefits include:
- Fast charge rates – Low over-potential and high voltage stability enable industry-leading fast charge rates, allowing a typical EV to add around 200 miles of range in under four minutes (charging from SOC 15 to 80%).
- High-rate capability – With up to three times the ionic conductivity (~26mS/cm at 25° C,~0.6 Li+ transference number) of standard electrolytes, Eternalyte significantly increases rate performance without impacting energy density regardless of the chemistry.
- Low-temperature performance – High ionic conductivity preserves battery performance at extremely low temperatures. When comparing individual cells, Eternalyte cells retain over 80% of their capacity at 1C rate and a cell temperature of -20° C, while cells with conventional electrolytes generally lose more than 80% of their capacity. This means that EVs with Eternalyte will have little to no range reduction in cold weather as compared to EVs using electrolytes that can lose 20 to 30% or more of their capacity in cold weather.
- Easy implementation – The Eternalyte viscosity is compatible with conventional manufacturing equipment enabling seamless integration into existing manufacturing processes.
- Enhanced safety – Exhibits strong performance with Li-metal cells and other chemistries in USABC and other abuse tests.
“Originally designed for lithium metal batteries, we quickly realized that the transformative nature of Eternalyte has far reaching benefits for all types of batteries,” said Naoki Ota, 24M CEO.
In addition, when used with 24M’s Impervio separator, Eternalyte delivers even stronger safety benefits and significant performance enhancements. Lithium dendrites (plating) tend to grow faster during rapid or low temperature charging, which reduces capacity and power and introduces significant safety risks.
An Eternalyte and Impervio combination overcomes these challenges with much higher ion transfer rates, dramatically reducing dendrite formation and preventing them from causing a thermal runaway event or fire. This improves overall battery safety and reduces the likelihood of product or vehicle recalls due to internal short circuits even when using high energy density chemistries.
Filed Under: Batteries, Technology News