Extended Data Fig. 4: XPS spectra of the Al° electrodes recovered from the Li° || Al° cells after the chronoamperometry (CA) tests (see in Fig. 3a) at room temperature.
From: Stable non-corrosive sulfonimide salt for 4-V-class lithium metal batteries
a, Al 2p spectra. b, F 1s spectra. c, O 1s spectra. d, C 1s spectra. See the detailed discussions associated with the results in the Supplementary Information.
