Figure 2: Chemical phase evolution.
From: Visualization of anisotropic-isotropic phase transformation dynamics in battery electrode particles
(a) Phase distribution as a function of charging time. The cut-away views reveal a change from anisotropic to isotropic phase boundary motion. (b) Phase volume fraction obtained from 3D quantitative analysis. (c) Standard XANES spectra for LiFePO4 and FePO4, showing clear energy shift of Fe K-edge. (d) The charging profile of LiFePO4 battery. XANES tomographic data sets were collected at the points indicated by the blue rectangles. (e) Agreement between lithium atomic ratio obtained from electrochemical measurement and from 3D volume analysis. Scale bar, 10 μm.
