Overview
- Mercedes‑Benz and ProLogium signed a joint testing agreement on Thursday, Sept. 24, 2026, giving Mercedes priority access to ProLogium’s Gen4 cells for vehicle‑grade electrical, thermal and safety evaluation.
- ProLogium describes Gen4 as an all‑inorganic lithium ceramic design using a non‑flammable inorganic electrolyte, a ceramic separator and a proprietary active safety mechanism that targets high energy density and fast charging; those performance claims are company reported and are pending independent and Mercedes testing.
- ProLogium says it has validated GWh‑scale manufacturing at its Taoke gigafactory in Taiwan and is building a Dunkirk, France plant with an initial 4 GWh phase and an ultimate design of up to 44 GWh to support European supply.
- The deal extends a near‑decade partnership in which Mercedes is a strategic investor with a board seat and is also testing other solid‑state partners, as it aims to field a production solid‑state EV by 2030.
- If Mercedes’ tests confirm ProLogium’s claims, automakers could get cells that enable faster charging and longer range, but large‑scale cost, industrial qualification and supply‑chain ramp‑up remain the key milestones to watch as ProLogium pursues a Nasdaq listing to fund expansion.