RESEARCH / A0015
Tailoring Unconventional Cyanogen Defect in High‐Entropy Prussian Blue Cathode Material for Advanced Sodium‐Ion Batteries
Read the original paper · 10.1002/adma.74630 ↗
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 1 Structure characterization. a) Rietveld refinement XRD patterns of HE-Cu, HE-Cu-PA, and HE-Ti-PA. b) ε calculated using Williamson– Hall analysis. c) EPR spectra. d) Crystal structure diagram of high-entropy PBA containing cyanide defect. e) EXAFS spectra and f) wavelet transform spectra of HE-Cu-PA. g) Bond length range difference of HE-Cu and HE-Cu-PA. h) EDS mapping images of HE-Cu-PA.
FIGURE 4 Charge compensation mechanism of HE-Cu-PA. a) Ex situ XANES and b) EXAFS spectra at Mn, Fe, Co, and Cu K-edge during the charge-discharge process. Wavelet transform of c) Fe and d) Cu K-edge EXAFS spectra. e) Debye–Waller factors and bond length of TM-N collected by the fitting EXAFS spectra. f) In situ Raman intensity contour plots during the charge–discharge process.