Fig. 3: Structural characteristics of S-NMO.
From: Engineering Na+-layer spacings to stabilize Mn-based layered cathodes for sodium-ion batteries

a XRD patterns and b FTIR spectra of pristine Na0.67MnO2, S-NMO, and hydration phase. c 23Na{1H} REDOR-dephased MAS NMR spectra of S-NMO and hydration phase. d SEM, e EDS mapping, f TEM, and g SAED results of pristine P2-type Na0.67MnO2 material. h SEM, i EDS mapping, j TEM, and k SAED results of S-NMO material.