Fig. 3: Characterization of discharge products and SEI composition on the cathodes.
From: Catalytic role of in-situ formed C-N species for enhanced Li2CO3 decomposition
In-situ DEMS analyses of Li-CO2 cells during first discharge/charge in a LiNO3 and b LiFSI electrolytes, tested at 200 µA within a capacity of 400 µAh. c C 1 s, F 1 s, and N 1 s XPS spectra for the cathodes after 3 cycles (Li2CO3: 290.6 eV, LiF: 685.5 eV, NO2−: 403.8 eV, and NO3−: 408.1 eV, respectively; the bonding configuration of pyrrolic-N at ~400.1 eV is in accord with C-N species)54. d The compounds assigned to the C, N, F, and S elements and their relative amounts. e C K-edge and N K-edge XANES spectra for the pristine cathode and cathodes after 3 cycles. The peak of Li2CO3 was highlighted by red shade with enlargement in the range of 289.5–291 cm−1 in the inset.
