Fig. 5: Evidence of NMC811 stabilization with CsNO3 additive.

a Ni, b Co, and c Mn L-edge soft X-ray absorption spectroscopy (sXAS) spectra of cycled NMC811 (100 cycles) with the baseline electrolyte and the electrolyte with CsNO3 additive. X-ray fluorescence (XRF) imaging showing the distribution of d Ni, e Co, and f Mn on Li metal upon cycling in the baseline electrolyte (top) and the electrolyte with CsNO3 additive (bottom) after 50 cycles.