24M Technologies has announced the development of a new battery electrolyte called Eternalyte that enables faster charging and improved performance in cold temperatures. The company says the technology addresses key challenges facing current lithium-ion batteries, particularly in EV applications.
The electrolyte achieves up to three times the ionic conductivity of standard electrolytes, which allows ions to flow more rapidly between the battery’s anode and cathode. This increased conductivity translates to a charge rate four times higher than conventional electrolytes, according to 24M. The company claims the technology can provide more than 300 km of additional range in under four minutes when charging from 15% to 80% capacity, without requiring megawatt charging infrastructure.
Cold weather performance represents another significant improvement. While conventional batteries typically lose about 25% of their capacity at 0°C and nearly all capacity at much lower temperatures, Eternalyte retains essentially full capacity at 0°C and more than 80% capacity at -40°C. This addresses a major limitation of current EVs in winter conditions and cold climates.
“24M’s Eternalyte electrolyte breakthrough solves some of the biggest challenges of lithium-ion batteries today,” said Naoki Ota, President and CEO at 24M Technologies. “Rapid charge, superior low-temperature performance and great cycle life with lithium-metal and other high energy density chemistries, Eternalyte provides outstanding performance for applications ranging from EVs to consumer products. It paves the way for next-gen batteries, including lithium metal, with 1,600-kilometer driving range and years of reliable performance.”
The electrolyte was initially designed for lithium metal batteries but can also be used with silicon and graphite-based batteries. 24M says the technology integrates easily into existing manufacturing processes and, when combined with the company’s Impervio separator, can deliver improved safety and longevity.
