Figure 7
(a) The discharge and charge curve of BC 39 (coin cell), (b) Raman spectra of pristine BC 39, control sample and BC 39 after first discharge at 0.05 mA cm−2; wavenumber range from 600 to 2000 cm−1, SEM images of BC 39 after the first discharge scans with magnifications (c) 5 µm scale-bar, and (d) 2 µm scale-bar; (e) EDS mapping for the discharge products in BC 39 and the different elements individually (f) carbon, (g) oxygen, (h) sodium and (i) fluorine Applied current 0.05 mA cm−2. Cut off potential: 1.6 V to 3.2 V.
