Yin Yinghui, Gaya Caroline, Torayev Amangeldi, Thangavel Vigneshwaran, Franco Alejandro A
Laboratoire de Réactivité et Chimie des Solides (LRCS), CNRS UMR 7314, Université de Picardie Jules Verne , 33 rue St. Leu, 80039 Amiens, France.
Réseau sur le Stockage Electrochimique de l'Energie (RS2E), Fédération de Recherche CNRS 3459 , 33 rue St. Leu, 80039 Amiens, France.
J Phys Chem Lett. 2016 Oct 6;7(19):3897-3902. doi: 10.1021/acs.jpclett.6b01823. Epub 2016 Sep 21.
We report a comprehensive multiscale model describing charge processes of Li-O batteries. On the basis of a continuum approach, the present model combines mathematical descriptions of mass transport of soluble species (O, Li, LiO) and elementary reaction kinetics, which are assumed to be dependent on the morphology of the LiO formed during discharge. The simulated charge curves are in agreement with previously reported experimental studies. The model along with the assumed reaction mechanisms provides physical explanations for the two-step charge profiles. Furthermore, it suggests that these charge profiles depend on the size of the LiO particles, which are determined by the applied current density during discharge. Therefore, the model underlines the strong link between discharge and charge processes.
