Eternalyte is a new electrolyte that delivers a step change in ionic conductivity, which is the rate at which ions flow between the anode and cathode. The higher a battery’s ionic conductivity, the faster the charge rate. With up to three times the ionic conductivity of standard electrolytes, 24M says that Eternalyte significantly increases rate performance without compromising energy density regardless of the chemistry.
This in turn enables a charge rate four times higher than a conventional electrolyte, delivering in excess of 300 kilometres of additional range under four minutes, resulting in a State of Charge (SOC) of 80 percent. Crucially, this ultra-fast charging capability does not require a mega-watt charging infrastructure.
Eternalyte’s high ionic conductivity and broad working temperature window also brings a significant increase in battery performance in extreme cold environments. Where conventional batteries lose about 25 percent of their capacity at 0°C and almost all capacity at much lower temperatures, 24M’s Eternalyte electrolyte retains essentially all capacity at 0°C and more than 80 percent capacity at -40°C, eliminating a major issue with current EVs in winter 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.”
Initially designed for lithium metal batteries, Eternalyte is also suitable for silicon and graphite-based batteries used in applications that require high power and low temperature performance with outstanding rapid charge rates and longevity. It can be easily integrated into existing manufacturing processes and used in combination with 24M's Impervio separator for a fundamentally safer battery with a longer operating life.
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