Fig. 6. Ex situ chemical characterizations of the SNCM electrodes after 150 cycles at 0.5 C (100 mA g⁻¹) within 2.75–4.6 V.

TOF-SIMS depth profiles of C₂F⁻ (a), ${\mathrm{PO}}_3^{-}$ (b), ${\mathrm{NiF}}_3^{-}$ (c) and ${\mathrm{MnF}}_3^{-}$ (d) species. 3D render of composition (C₂F⁻, ${\mathrm{PO}}_3^{-}$, ${\mathrm{NiF}}_3^{-}$, and ${\mathrm{MnF}}_3^{-}$) and concentration distribution (e) and TOF-SIMS chemical imaging of C₂F⁻, ${\mathrm{PO}}_3^{-}$, ${\mathrm{NiF}}_3^{-}$, and ${\mathrm{MnF}}_3^{-}$ species (f) on the SNCM and AZ0.3-SNCM cathode surface.