fig4
From: A low-concentration sulfone electrolyte enables high-voltage chemistry of lithium-ion batteries

Figure 4. Typical HR-TEM images of cycled MCMB electrodes recovered from MCMB||NCM811 full cells after 50 cycles with (A) BE, (B) LiDFOB-LiBF4/SL and (C) LiDFOB-LiBF4/SL-FB. (D) XPS F 1s, O 1s and B 1s spectra for MCMB anodes recovered form MCMB||NCM811 full cells after 50 cycles with various electrolytes.