Sales of electric vehicles are growing strongly despite a certain unevenness in this growth across the globe. But overall, this growth is not strong enough to give battery researchers a break—work is still underway for batteries that are more reliable, faster to charge, and longer-living. In that, the EV industry may have a somewhat unlikely champion—none other than oil supermajor Exxon. Last week, Exxon announced it had invented a new graphite molecule that could extend the life of an electric vehicle ...