Fig. 2: Reduction of polysulfides at 2.0 V vs. Li+/Li.
From: Understanding the lithium–sulfur battery redox reactions via operando confocal Raman microscopy
a Chronoamperometric current-time transient of polysulfide reduction at 2.0 V (vs. Li+/Li). Operando Raman (b) spectra and c–f mapping images of the cathode during reduction in 1.0 M Li2S4 electrolyte. The blue color in c–f represents the region at 400 cm−1. The color contrast remains consistent for quantification. g Plots of the concentration changes in 1.0, 0.75, and 0.5 M Li2S4 electrolytes with time. h Linear fitting of the logarithm of Li2S4 concentration evolution with time according to first-order kinetics, R2 = 0.982, 0.979, 0.968 for 1.0, 0.75, and 0.5 M electrolytes, respectively. i Values of kps extracted from the fits. The error bars represent the standard deviation of the linear fits.
