Fig. 4

SEM and TEM images of LNMO electrodes, (a, b) before cycling; (c, d) after 500 cycles at 5 C in STD electrolyte; (e, f) after 500 cycles at 5 C in STD + Mg electrolyte; The XPS spectra of LNMO electrodes in STD and STD + Mg electrolytes after 500 cycles at 5 C, (g) C 1s, (h) O 1s, (i) F1s, (j) P 2p.