Slimmed Solvation Structure With Dual‐Interface Regulation for High‐Performance and Safe Lithium‐Sulfur Batteries (Adv. Mater. 55/2026)

Lithium-Sulfur Batteries This cover illustrates a slimmed solvation structure regulation strategy for lithium-sulfur battery electrolytes. Under lean electrolyte and high polysulfide concentration conditions, Li+ is heavily “bound” by anion aggregates (Sn2− and TFSI−); by introducing symmetric cations, the excess anions around Li+ are precisely stripped away, ensuring rapid Li+ transport under lean electrolyte conditions. Meanwhile, the symmetric cations assemble into a uniform positively charged layer at the anode interface, inducing the formation of a dense and stable SEI film. This strategy breaks through the core bottlenecks of energy density, safety, and cycle life, providing a new direction for the design of high performance, high-safety lithium-sulfur batteries. More details can be found in the Research Article by Fangyuan Hu and co-workers (DOI: 10.1002/adma.74357).