article published yes Chunmei Li author Olivier Fontaine author Stefan Alexander Freunberger author A8CA28E6-CE23-11E9-AD2D-EC27E66974250000-0003-2902-5319 Lee Johnson author Sylvie Grugeon author Stéphane Laruelle author Peter G. Bruce author Michel Armand author Several problems arise at the O2 (positive) electrode in the Li-air battery, including solvent/electrode decomposition and electrode passivation by insulating Li2O2. Progress partially depends on exploring the basic electrochemistry of O2 reduction. Here we describe the effect of complexing-cations on the electrochemical reduction of O2 in DMSO in the presence and absence of a Li salt. The solubility of alkaline peroxides in DMSO is enhanced by the complexing-cations, consistent with their strong interaction with reduced O2. The complexing-cations also increase the rate of the 1-electron O2 reduction to O2•– by up to six-fold (k° = 2.4 ×10–3 to 1.5 × 10–2 cm s–1) whether or not Li+ ions are present. In the absence of Li+, the complexing-cations also promote the reduction of O2•– to O22–. In the presence of Li+ and complexing-cations, and despite the interaction of the reduced O2 with the latter, SERS confirms that the product is still Li2O2. ACS2014 eng 1932-7447 1932-745510.1021/jp4093805 11873393-3401 yes Li, Chunmei, et al. “Aprotic Li–O2 Battery: Influence of Complexing Agents on Oxygen Reduction in an Aprotic Solvent.” <i>The Journal of Physical Chemistry C</i>, vol. 118, no. 7, ACS, 2014, pp. 3393–401, doi:<a href="https://doi.org/10.1021/jp4093805">10.1021/jp4093805</a>. C. Li <i>et al.</i>, “Aprotic Li–O2 battery: Influence of complexing agents on oxygen reduction in an aprotic solvent,” <i>The Journal of Physical Chemistry C</i>, vol. 118, no. 7. ACS, pp. 3393–3401, 2014. Li, C., Fontaine, O., Freunberger, S. A., Johnson, L., Grugeon, S., Laruelle, S., … Armand, M. (2014). Aprotic Li–O2 battery: Influence of complexing agents on oxygen reduction in an aprotic solvent. <i>The Journal of Physical Chemistry C</i>. ACS. <a href="https://doi.org/10.1021/jp4093805">https://doi.org/10.1021/jp4093805</a> Li, Chunmei, Olivier Fontaine, Stefan Alexander Freunberger, Lee Johnson, Sylvie Grugeon, Stéphane Laruelle, Peter G. Bruce, and Michel Armand. “Aprotic Li–O2 Battery: Influence of Complexing Agents on Oxygen Reduction in an Aprotic Solvent.” <i>The Journal of Physical Chemistry C</i>. ACS, 2014. <a href="https://doi.org/10.1021/jp4093805">https://doi.org/10.1021/jp4093805</a>. Li C, Fontaine O, Freunberger SA, Johnson L, Grugeon S, Laruelle S, Bruce PG, Armand M. 2014. Aprotic Li–O2 battery: Influence of complexing agents on oxygen reduction in an aprotic solvent. The Journal of Physical Chemistry C. 118(7), 3393–3401. Li C, Fontaine O, Freunberger SA, et al. Aprotic Li–O2 battery: Influence of complexing agents on oxygen reduction in an aprotic solvent. <i>The Journal of Physical Chemistry C</i>. 2014;118(7):3393-3401. doi:<a href="https://doi.org/10.1021/jp4093805">10.1021/jp4093805</a> C. Li, O. Fontaine, S.A. Freunberger, L. Johnson, S. Grugeon, S. Laruelle, P.G. Bruce, M. Armand, The Journal of Physical Chemistry C 118 (2014) 3393–3401. 73012020-01-15T12:17:28Z2021-01-12T08:12:53Z