Fig. 5: Investigations on sulfur redox durability in KSBs.
From: Optimizing potassium polysulfides for high performance potassium-sulfur batteries
a SAED patterns of post-cycled NC/S, W2C@NC/S, or WSA-W2C@NC/S cathodes. b–d SEM images and corresponding EDS mapping of post-cycled NC/S (b), W2C@NC/S (c) and WSA-W2C@NC/S (d) cathodes. e Configuration evolution of K2S2 migration from W2C catalytic site to WSA modified NC substrate. f Energy barriers of K2S2 and K2S migration from W2C catalytic site to WSA modified NC substrate or pure WSA-free NC substrate. g Schematic illustration of the potassium-sulfur electrochemistry in KSBs employing NC/S, W2C@NC/S and WSA-W2C@NC/S cathodes. Source data are provided as a Source Data file.
