https://techcrunch.com/2022/01/04/panasonic-redwood-battery-cell-production-tesla/

Panasonic battery cells made at the Gigafactory it operates with Tesla will use more recycled materials by the end of 2022 as part of an expanded partnership with startup Redwood Materials.

Panasonic said Tuesday at the 2022 CES tech trade show that Redwood Materials will start supplying it with copper foil produced from recycled materials, a critical component of the anode side of a battery cell. Redwood will begin producing the copper foil in the first half of the year; the copper foil will then head to Panasonic where it will be used in cell production by the end of the year.