Fig. 3: Oxidation of polysulfides at 2.40 V vs. Li+/Li.
From: Understanding the lithium–sulfur battery redox reactions via operando confocal Raman microscopy
a Chronoamperometric current-time transient of polysulfide oxidation at 2.40 V (vs. Li+/Li). b Dimensionless plot of (a) according to SH and BFT models. Operando Raman (c) spectra and (d–h) mapping images during oxidation. Blue: intermediate polysulfides, Red: elemental sulfur, the color contrasts remain consistent in (d–h) for quantification. i Plots of the changes of the polysulfides (blue, decrease) and sulfur (red, increase) with time. Inset: Linear fit of the logarithm of the area changes with time according to first-order kinetics, R2 = 0.984 and 0.972 for the polysulfides and sulfur, respectively.
