Ultrathin Zincophilic Interphase Regulated Electric Double Layer Enabling Highly Stable Aqueous Zinc-Ion Batteries

Abstract The practical application of aqueous zinc-ion batteries for large-grid scale systems is still hindered by uncontrolled zinc dendrite and side reactions. Regulating the electrical double layer via the electrode/electrolyte interface layer is an effective strategy to improve the stability of Zn anodes. Herein, we report an ultrathin zincophilic ZnS layer as a model regulator. At a given cycling current, the cell with Zn@ZnS electrode displays a lower potential drop over the Helmholtz layer (stern layer) and a suppressed diffuse layer, indicating the regulated charge distribution and decreased electric double layer repulsion force. Boosted zinc adsorption sites are also expected as proved by the enhanced…

• UO
  University of Alberta
• CS
  China Scholarship Council

  Award: 202006450027
• CF
  Canada First Research Excellence Fund

  Award: FES-T06-Q03
• NS
  Natural Sciences and Engineering Research Council of Canada

  Awards: RGPIN-2018, RGPIN-2018-06725, NFRFE-2019-00488, RGPAS-2018-522651