Sheet-on-sheet ZnIn₂S₄@RGO-modified separators with abundant sulfur vacancies for high-performance Li-S batteries.

ABSTRACT: A novel sheet-on-sheet architecture with abundant sulfur vacancies (Vs) is designed by in situ growth of flake-like ZnIn₂S₄ on the reduced graphene oxide (Vs-ZIS@RGO) surface, which serves as a functional layer on the separators for high-performance lithium-sulfur batteries (LSBs). Benefiting from the sheet-on-sheet architecture, the separators exhibit rapid ionic/electronic transfer, which is capable of supporting fast redox reactions. The vertically ordered ZnIn₂S₄ shortens the diffusion pathways of lithium-ions and the irregularly curved nanosheets expose more active sites to effectively anchor lithium polysulfides (LiPSs). More importantly, the introduction of Vs adjusts the surface or interface electronic structure of ZnIn₂

SUBMITTER: Wu L 

PROVIDER: S-EPMC10167492 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature