Polymeric Ionic Liquid-Enabled In Situ Protection of Li Anodes for High-Performance Li-O₂ Batteries.

ABSTRACT: Redox mediators (RMs) have shown promise in enhancing Li-O₂ battery cycling stability by reducing overpotential. However, their application is hindered by the shuttle effect, leading to RM loss and Li anode corrosion. Here, we introduce a polyionic liquid, poly (1-Butyl-3-vinylimidazolium bis(trifluoromethanesulfonylimine)) ([PBVIm]-TFSI) as an additive, showcasing a novel Li anode protection strategy for LiI-mediated Li-O₂ batteries. [PBVIm]⁺ cations migrate to the Li anode, forming a protective cationic shield that promotes uniform Li⁺ deposition. The addition of [PBVIm]-TFSI enhances the cycling stability, achieving 105 cycles at 200 mA⋅g^-1, compared to the cell with LiI which exhibited 38 cycles under the same conditions. Synchrotr

SUBMITTER: Li D 

PROVIDER: S-EPMC11960590 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature