24M Technologies, a technology company focusing on battery design and manufacturing, has developed Eternalyte, an electrolyte designed to provide ultra-fast charging and better performance in extreme cold temperatures.

Eternalyte looks to bring about a change in 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 – and with up to three-times the ionic conductivity of standard electrolytes, Eternalyte should increase rate performance without compromising energy density regardless of the chemistry.

Resulting in a charge rate four-times higher than a conventional electrolyte, Eternalyte technology can deliver 300+km of additional range in under four minutes (charging from SOC 15% to 80%).

This ultra-fast charging capability does not require a mega-watt charging infrastructure, and due to a high conductivity and working temperature window, the technology brings an increase in battery performance in extreme cold environments.

Where conventional batteries lose about 25% 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% capacity at -40°C, hoping to eliminate a major issue with today’s EVs in winter and cold climates.

Naoki Ota, president and CEO at 24M Technologies said: “24M’s Eternalyte electrolyte breakthrough solves some of the biggest challenges of lithium-ion batteries today.

“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 can be a solution for silicon and graphite-based batteries used in applications that require high power and low temperature performance designed for faster charge rates and longevity.

It aims to be easily integrated into existing manufacturing processes and when used with 24M’s Impervio™ separator, Eternalyte intends to deliver a fundamentally safer, long-lived battery.