image: A schematic showing the formation of lithium hydroxide (LiOH) on the graphene electrode on discharging a non-aqueous lithium-oxygen battery in the presence of the redox mediator lithium iodide and trace water (top). On charging, the iodide is oxidized to iodine, which helps to remove the LiOH and reform the bare graphene electrode (bottom). This material relates to a paper that appeared in the Oct. 30, 2015 issue of Science, published by AAAS. The paper, by T. Liu at University of Cambridge in Cambridge, UK, and colleagues was titled, 'Cycling Li-O? batteries via LiOH formation and decomposition.' view more
Credit: Tao Liu, Gabriella Bocchetti and Clare P. Grey