Safer lithium-ion batteries move closer as 3D-printed cobalt-free electrodes boost power (opens in new tab)

Since the early 2000s, lithium-ion (Li-ion) batteries have become the predominant rechargeable power source for many mobile devices, electric vehicles, renewable-energy storage grids and more. But the Li-ion batteries in commercial use carry both safety risks and limitations. Julia R. Greer, the Ruben F. and Donna Mettler Professor of Materials Science, Mechanics and Medical Engineering at Caltech, whose lab has been working to improve Li-ion batteries, has now established a new path toward m...