Factorial Taps Hyundai Supplier To Solve Solid-State Batteries’ Biggest Problem

The Story

Can you really mass-produce solid state batteries on existing battery lines? Factorial and SK On plan to find out. Here’s what’s happening:

Factorial Energy has been working on solid- and semi-solid-state batteries for years. The startup will now evaluate whether it can use SK On’s existing battery plants to mass produce its solid-state cells. Its semi-solid-state batteries are already testing in prototype EVs out in the real world.

In other words, massachusetts-based battery startup Factorial Energy has signed a memorandum of understanding with South Korean battery giant SK On to explore how solid-state batteries can be mass-produced using existing lithium-ion manufacturing lines. Factorial is one of the frontrunners in the race to commercialize solid-state…

That is — mercedes EQS prototype with Factorial’s semi-solid-state battery.

To put it simply, while solid-state batteries promise significantly higher energy density, faster charging and improved safety by replacing flammable liquid electrolytes with solid materials, they’ve proven notoriously difficult to manufacture at scale without defects. That’s where SK On comes in. The company will evaluate whether its…

Breaking this down, a Dodge Charger Daytona EV prototype testing Factorial’s semi-solid-state battery.

Now, sK On already supplies batteries to Hyundai, Kia, Ford, Volkswagen and Ferrari. The company has about 200 gigawatt-hours of annual battery manufacturing capacity worldwide. Roughly half of that, about 100 GWh, is installed in the U.S.

Why It Matters

This story resonates because it puts Hyundai squarely in the conversation. Industry watchers often read such moves as signals — for Hyundai this could mean re-engagement with a strategic recalibration.

CarMotion Daily’s Take

Our read: Factorial Taps Hyundai Supplier To Solve Solid-State Batteries’ Biggest Problem is more than a headline — it indicates a deliberate move from Hyundai’s playbook. Watch the next 60 days for follow-through.