Automakers, including Tesla and Mercedes, are rushing to lock in graphite supply from outside dominant producer China, as demand for electric vehicle (EV) batteries outpaces other uses for the mineral for the first time due to soaring EV sales. Auto firms have been slow to plan for graphite shortages, focusing mainly on better-known battery materials lithium and cobalt, even though graphite is the largest battery component by weight. Now, car makers are knocking at the doors of new producers, such as Madagascar and Mozambique, as this year EVs are forecast to account for more than 50% of the...