Figure 12
Sequential 1 µm-resolution XRDCT slices taken during discharge of the Li versus LixMn2O4 cell, showing the progression of lithiation of the electrode phase. The discharge profile is shown as an inset and the blue regions indicate when XRDCT slices were recorded. A particle that appears to deviate from the bulk is isolated and magnified. (b) Histograms composed of the lattice parameter values assigned to each voxel in XRDCT slices 1–5. The pink region highlights the range of lattice parameter values over which a bi-phasic reaction of LixMn2O4 passes without occupying, i.e. a region that is not characteristic of the spinel LixMn2O4 stoichiometry. (c) Equivalent histograms for the single isolated particle showing that for XRDCT 1 the particle's lattice parameter occupied a range that is not typical for LixMn2O4. |