Solvating Additives and Their Role in Increasing the Capacity of Nonaqueous Li-O2 Batteries
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Figure 1: Proposed mechanism for the growth of Li2O2 toroids in the presence of water. The deposition of Li2O2 in a Li-O2 cell is shown, schematically, to proceed via a surface electrochemical growth process. The presence of a additive (water in our experiments) that solvates LiO2* to Li+ and O2- triggering a solution mechanism. Design rules for additive engineering are presented in the contour plot.