Developing A "Polysulfide‐Phobic" Strategy to Restrain Shuttle Effect in Lithium–Sulfur Batteries. Issue 34 (19th July 2019) - He, Yibo
Abstract: Inspired by hydrophobic interface, a novel design of "polysulfide‐phobic" interface was proposed and developed to restrain shuttle effect in lithium–sulfur batteries. Two‐dimensional VOPO4 sheets with adequate active sites were employed to immobilize the polysulfides through the formation of a V−S bond. Moreover, owing to the intrinsic Coulomb repulsion between polysulfide anions, the surface anchored with polysulfides can be further evolved into a "polysulfide‐phobic" interface, which was demonstrated by the advanced time/space‐resolved operando Raman evidences. In particular, by introducing the "polysulfide‐phobic" surface design into separator fabrication, the lithium–sulfur battery performed a superior long‐term cycling stability. This work expands a novel strategy to build a "polysulfide‐phobic" surface by "self‐defense" mechanism for suppressing polysulfides shuttle, which provides new insights and opportunities to develop advanced lithium–sulfur batteries. Abstract : A novel "polysulfide‐phobic" strategy was proposed to restrain shuttle effect in Li–S batteries. Owing to the intrinsic electronegativity of polysulfide anions, the polar materials anchored with polysulfides can evolve into a "polysulfide‐phobic" surface and performed strong repulsion effect on the free polysulfides anions, which was demonstrated by the advanced time/space‐resolved operando Raman evidences.