Macron made the announcement from Dunkirk, where he was officially announcing a 5.2 billion euros ($5.7 billion) investment by Taiwanese battery maker ProLogium in a new gigafactory in the same city.

"We just signed, with a joint venture between XTC and Orano, a second investment for the production of cathode material in lithium batteries," Macron said, adding that the venture would create 1,700 jobs.

Cathode materials, comprised of cobalt, nickel and manganese, are the main component of lithium batteries.

"(The XTC/Orano JV) will allow us to secure the top end of the value chain in lithium batteries production," Macron added.

The French president said ProLogium and the XTC/Orano joint venture would create 5,000 new jobs overall in Dunkirk.

(Reporting by Dominique Vidalon and Elizabeth Pineau; Editing by Leigh Thomas)