Mercedes-Benz tests ProLogium Gen4 solid-state batteries

Automakers are intensifying their pursuit of solid-state battery technology to improve electric vehicle safety, range, and charging speeds. Mercedes-Benz has entered a testing agreement with ProLogium to evaluate the company’s Gen4 lithium-ceramic cells. These cells utilize an inorganic electrolyte, ceramic separators, and a silicon anode, aiming for high energy density and rapid charging. Mercedes will conduct electrical, thermal, and safety tests at its own facilities and through external laboratories to determine if the technology is suitable for future vehicle platforms.

Separately, Hyundai Motor Group’s R&D chief, Manfred Harrer, emphasized that the industry must not abandon solid-state development despite the current dominance of liquid electrolyte lithium-ion batteries. While Harrer predicts that small-volume, high-end models featuring solid-state batteries could reach the market within five years, he cautioned that raw material costs will remain extremely high for many years, posing a significant barrier to mass-market adoption.

ProLogium is currently scaling operations with a factory in Taoyuan, Taiwan, and is developing a new production site in Dunkirk, France, to serve the European market.