Comment on “Cycling Li-O 2 batteries via LiOH formation and decomposition”

Liu et al . (Research Article, 30 October 2015, p. 530) described a lithium-oxygen (Li-O 2 ) battery based on lithium iodide (LiI)–assisted lithium hydroxide (LiOH) formation and decomposition. We argue that LiOH cannot be oxidized by triiodide (I 3 – ). The charge capacity is from the oxidation of I – instead of LiOH. The limited-capacity cycling test is misleading when the electrolyte contributes considerable parasitic reaction capacity.