Regulating Polysulfide Clustering with an Anion Acceptor for Low-Temperature Sulfur Batteries

S growth via solution-mediated mechanism at low temperatures. With the borane anion acceptor, the cell shows a significantly improved capacity at -25 °C. Impressively, this strategy enables stable cycling of a 1.83 Ah pouch cell at 0 °C retaining 96.0% capacity over 50 cycles. Our study provides a general methodology for manipulating the fundamental electrolyte chemistry to regulate LiPSs clustering and improve sulfur batteries at harsh conditions.