Figure 1. Electrochemical response of an NWC-based Li/S electrode and an aluminum foil-based Li/S electrode.

(a) Charge/discharge profile of a sulphur electrode on NWC current collector. (b) Discharge capacity fading over 31 cycles of an electrode with an NWC current collector (squares) and an aluminum foil current collector (spheres). The electrode with the NWC current collector has higher discharge capacity throughout cycling. Black arrows mark the electrodes which we investigated in this study. (c)- (d) Examples of morphological changes in the electrode found with X-ray phase contrast tomography (c: before the first cycle, d: before the 11^th cycle). Sulphur loading strongly decreases, the particles shrink, spread and partially loose contact to the carbon materials of the electrode, namely the current collector and the carbon- binder domain. The black size markers are 50 μm wide.