In this work, a comprehensive multiscale model is reported to describe charge processes of Li−O2 batteries. On the basis of a continuum approach, the present model combines mathematical descriptions of mass transport of soluble species (O2, Li+, LiO2) and detailed elementary reactions. The decomposition kinetics of the Li2O2 particles are assumed to be morphology dependent and the simulated charge curves are in good agreement with experimental studies reported in literature previously.1 The model along with the assumed reaction mechanisms provides physical explanations for the characteristic two-step charge profiles. Moreover, since the morphology of Li2O2depends strongly on the applied current density during discharge and operation history upon cycling, the model underlines the strong link between discharge and charge processes. The experimental validation and comparison will be also discussed in the talk.
 Zhai, D.; Wang, H.-H.; Yang, J.; Lau, K. C.; Li, K.; Amine, K.; Curtiss, L. A. J. Am. Chem. Soc. 2013, 135, 15364–15372.