Spatial Distributions of Discharged Products of Lithium-Oxygen Batteries Revealed by Synchrotron X-ray Transmission Microscopy.

摘要: The discharge products of ether-based Li–O2 cells were grown directly on common carbon-coated TEM grids and observed by oxidation-state-sensitive full field transmission soft X-ray microscopy (TXM). acquired data have permitted to quantify localize with spatial resolution the distribution oxygen in these samples (i.e., lithium superoxide, peroxide, carbonates) appreciate several compositional, structural, morphological aspects. Most peroxide particles had a toroidal shape, often central hole usually open only one side, which included significant amounts superoxide-like phases (LiO2/Li2O2 ratio between 0.2 0.5). Smaller smaller or no superoxide content, from we infer that abundance soluble LiO2 may role toroid formation. Significant amount carbonates found irregularly distributed electrode surface, occasionally appearing as small aggregates, mostly coating pero...