RESEARCH / A0466
Invoking Interfacial Engineering Boosts Structural Stability Empowering Exceptional Cyclability of Ni-Rich Cathode
Read the original paper · 10.1002/adma.202405628 ↗
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 2. SEM images of a) NCM811 and b) NCMS@FEO3. HRTEM and HAADF-STEM images of c,d) NCM811 and e,f) NCMS@FEO3. Joint refinement XRD and NPD Rietveld refinement results of g,h) NCM811 and i,j) NCMS@FEO3. k,l) Ni K-edges XANES spectra and EXAFS R space curves for NCM811 and NCMS@FEO3 cathodes.
Figure 4. In situ XRD patterns of a) NCM811 and b) NCMS@FEO3 during the lithiation/delithiation process for the initial cycle of (003) and (104) reflection at 0.1C between 3.0 and 4.5 V. In situ XANES spectra at Ni K-edges during charging for 1st cycle of c) NCM811 and d) NCMS@FEO3 at 0.1C between 3.0 and 4.5 V. In situ EPR spectra during the initial cycle of the e) NCM811 and f) NCMS@FEO3 at 0.1C between 3.0 and 4.5 V. Stress simulation during the initial charging/discharging process for g) NCM811 and h) NCMS@FEO3 electrodes by COMSOL software. i) Oxygen loss and Li/Ni mixing mechanism of NCM811. j) Schematic illustration of the impact of interfacial engineering strategy on the formation energy of surface oxygen vacancies for NCM811 cathode.