A new redox-active layer adds energy storage capacity and suppresses corrosion in lithium-sulphur batteries.
To prevent this polysulfide shuttling, prior research focused on placing a redox-inactive interlayer between the cathode and anode. The term “redox-inactive” means the material does not undergo reactions like those in an electrode. But this protective interlayer is heavy and dense, reducing energy storage capacity per unit weight for the battery. It also does not adequately reduce shuttling.
“Previous experiments with cells having the redox-inactive layer only suppressed the shuttling, but in doing so, they sacrificed the energy for a given cell weight because the layer added extra weight,” said Guiliang Xu, a chemist and co-author of the study. “By contrast, our redox-active layer adds to energy storage capacity and suppresses the shuttle effect.”
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