Extended Data Fig. 5: Multi-dimensional structural-stability characterization of NMC-811 and HE-LNMO.
From: Compositionally complex doping for zero-strain zero-cobalt layered cathodes
a, Wavelet-transformed Ni-K edge EXAFS of HE-LNMO and NMC-811 during long-term cycling. b–c, Soft X-ray absorption (XAS) of Ni-L3 edge in cycled NMC-811 and HE-LNMO (cutoff 2.5–4.3 V, 1C) at TFY mode (b) and TEY mode (c). d–e, lattice parameters change during long cycling of (d) HE-LNMO and (e) NMC-811 calculated by XRD. f–h, X-ray fluorescence (XRF) mapping result of Ni dissolution on the graphite (Gr) anode. Ni distribution on Gr anode paired with HE-LNMO (f) and NMC-811 (g), respectively (cycling condition: 2.5V–4.4 V vs Gr, 1C; field of view: 0.25mm*0.25mm). h, Quantitative result derived from the data in f and g. i, SAED pattern of pristine HE-LNMO cathode and that after 500th long cycles. j, EDS mapping of long cycled HE-LNMO, showing the stable element distribution during long cycling.
