RESEARCH / A0055
Mechanical Stress Relief and Na+ Diffusion Enhancement via Bond Tuning and Vacancy Disorder in Low-Sodium O3 Cathodes
Read the original paper · 10.1021/acsnano.6c07952 ↗
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. Electronic structure and charge compensation mechanism. (a) Ti 2p, (b) Cu 2p, and (c) Mn 2p XPS spectra of HE-NNMO at various electrochemical states. (d,e) Ex situ XANES spectra and (f,g) Fourier-transformed EXAFS spectra of Fe K-edge, and Ni K-edge at pristine, fully charged (4.2 V), and fully discharged (2.0 V) states; insets show the magnified spectra. Contour plots of the (h) Fe and (i) Ni K-edge WT-EXAFS spectra at different charged and discharged states.