Key Takeaways GM reached a deal with EV battery materials company Vianode to supply the automaker with synthetic anode graphite.Anode graphite is the largest material by weight in lithium-ion batteries,

The deal, with Norway’s Vianode, is for delivery of a material critical for electric-vehicle batteries.

Once Norway's Vianode launches production in North America, the deal will run through 2033. The new plant could be in the U.S. or Canada.

General Motors has signed a multi-year, multi-billion dollar agreement for Norway's Vianode to provide the U.S. automaker with synthetic graphite anode materials for its electric vehicle batteries, the companies said on Wednesday.

The "multibillion"-dollar deal, according to a news release, covers supply of synthetic anode graphite toward 2033.