In a paper revealed in 2019, Niu et al. managed to arrange rechargeable lithium metallic coin cells utilizing the identical parameters required for 350 Wh kg–1 pouch cells and achieved greater than 200 occasions secure cycle life (Nat. Nanotechnol. 14, 594–601; 2019). All this by working underneath life like circumstances. The paper by Niu et al. was one of many first to indicate that by cautious engineering of the solid-electrolyte interface one may obtain good performances. “I imagine the success of our paper was right down to timeliness. Demonstrating high-energy lithium metallic batteries with good cyclability was (and nonetheless) extraordinarily difficult,” says Jun Liu, corresponding writer of the paper from the Pacific Northwest Nationwide Laboratory in Richland, USA.