Figure 7
Typical cross section of an electrode after 2 cycles and contact area evolution of the phases present in a Li/S electrode.
(a) Absorption X-ray image of the electrode after 2 cycles. The fibrous NWC can be seen. Empty CBD shells appear in the top region (1). The white particles are sulphur particles. They either have contact area with the pore space (2) or with the conducting network (3). (b) Contact area of sulphur and carbon material (solid lines, top) and between sulphur and pore space (dashed lines, bottom). The shaded regions represent intervals of possible values, where II represents the upper values of contact between sulphur and pore and I two lower values. They come from two different thresholds used to identify contact areas (see Method section). The scale bar is 50 μm wide.
