Australia's Piedmont Lithium has signed a five-year deal to supply high-purity lithium ore mineral to Tesla. The initial agreement entails the supply of about a third of Piedmont Lithium's planned 1.6 lakh-tonnes-per-year spodumene concentrate production. The deal is conditional upon both companies agreeing to start deliveries between July 2022 and July 2023, Piedmont Lithium said.