[Technical Response] Response to Comment on “Cycling Li-O2 batteries via LiOH formation and decomposition”
Thursday, May 5, 2016 - 14:01
in Physics & Chemistry
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. Authors: Tao Liu, Gunwoo Kim, Javier Carretero-González, Elizabeth Castillo-Martínez, Paul M. Bayley, Zigeng Liu, Clare P. Grey