> “The chemical reaction for lithium superoxide or peroxide only involves one or two electrons stored per oxygen molecule, whereas that for lithium oxide involv

> “The chemical reaction for lithium superoxide or peroxide only involves one or two electrons stored per oxygen molecule, whereas that for lithium oxide involves four electrons,” said Argonne chemist Rachid Amine. More electrons stored means higher energy density. I find it odd and surprising that the limiting factor is electrons per oxygen, not electrons per lithium. Oxygen is freely floating in the air, while lithium is in a fixed amount in the battery. Possibly something about the electrode makes it store a limited quantity of oxygen.