RESEARCH / A0377
Ni Migration-Induced Strain and Phase Segregation in LiNiO2 Cathodes
Read the original paper · 10.1021/acsnano.5c03288 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 3. (a) XANES of pristine and charged (4.4 V) LNO. EXAFS spectra and their fittings of (b) pristine and (c) charged (4.4 V) surfaces in real space. LNO aberration-corrected transmission electron microscopy (AC-TEM) images (along [100] zone axis, scale bar 2 nm), selected area electron diffraction (SAED), and geometrical phase analysis (GPA) patterns for pristine (d−f) and charged (4.4 V) LNO (h−j). The graphs next to the SAED patterns are the high-angle annular dark-field (HAADF) signal profiles of STEM images. The arrows in the signal profile of the charged sample indicate the migration of Ni.