>They explored coating its copper current collector with ultrathin lithium-activated tellurium. The aim was to control the way in which lithium metal spread acr

>They explored coating its copper current collector with ultrathin lithium-activated tellurium. The aim was to control the way in which lithium metal spread across or “wetted” the copper. They found this new coating helped lithium metal deposit and dissolve from the copper current collector in a thin uniform layer. Wikipedia: With an abundance in the Earth's crust comparable to that of platinum (about 1 µg/kg), tellurium is one of the rarest stable solid elements.