Response to Comment on "Cycling Li-O₂ batteries via LiOH formation and decomposition"

Lithium-oxygen (Li-O2) 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(-) ↔ 2H2O + O2 + 4e(-), is at 3.34 V versus Li...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2016-05, Vol.352 (6286), p.667
Main Authors: Liu, Tao, Kim, Gunwoo, Carretero-González, Javier, Castillo-Martínez, Elizabeth, Bayley, Paul M, Liu, Zigeng, Grey, Clare P
Format: Article
Language:English
Online Access:Get full text
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Summary:Lithium-oxygen (Li-O2) 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(-) ↔ 2H2O + O2 + 4e(-), is at 3.34 V versus Li(+)/Li, LiOH cannot be removed by the triiodide ion (I3(-)). However, under nonaqueous conditions, this reaction will occur at a different potential. LiOH also reacts chemically with I3(-) to form IO3(-), further studies being required to determine the relative rates of the two reactions on electrochemical charge.
ISSN:1095-9203
DOI:10.1126/science.aad8843