Lithium-oxygen (Li-O ₂ ) batteries cycle reversibly with lithium iodide (LiI) additives in dimethoxyethane (DME) to form lithium hydroxide (LiOH). Viswanathan et al. argue that because the standard redox potential of the four-electron (e ⁻ ) reaction, 4OH ^– ↔ 2H ₂ O + O ₂ + 4 e ^– , is at 3.34 V versus Li ⁺ /Li, LiOH cannot be removed by the triiodide ion (I ₃ ^– ). However, under nonaqueous conditions, this reaction will occur at a different potential. LiOH also reacts chemically with I ₃ ^– to form IO ₃ ^– , further studies being required to determine the relative rates of the two reactions on electrochemical charge.