Figure 4: Structural changes of disordered and ordered Na2RuO3 during charge.
From: Intermediate honeycomb ordering to trigger oxygen redox chemistry in layered battery electrode
(a) Interlayer distance of the different phases involved on desodiation as a function of x in disordered and ordered NaxRuO3. (b) Crystal structure of ilmenite-type Na1RuO3. All Na ions displace cooperatively towards Na vacancies in the honeycomb planes. (c) Observed and calculated (Rietveld method) synchrotron X-ray diffraction patterns for ordered Na1RuO3. Red crosses: experimental, black line: calculated, blue line: difference and green bars: Bragg positions. The inset shows the selected area electron diffraction (SAED) pattern for ilmenite-type Na1RuO3. Scale bar, 10 nm−1 (d) Ex situ XRD patterns showing the evolution of the superstructure peaks for ordered NaxRuO3 on charge.
