Stable zinc anode solid electrolyte interphase via inner Helmholtz plane engineering.

ABSTRACT: The inner Helmholtz plane and thus derived solid-electrolyte interphase (SEI) are crucial interfacial structure to determine the electrochemical stability of Zn-ion battery (ZIB). In this work, we demonstrate that introducing β-cyclodextrins (CD) as anion-receptors into Zn(OTf)₂ aqueous electrolyte could significantly optimize the Zn anode SEI structure for achieving stable ZIB. Specifically, β-CD with macrocyclic structure holds appropriate cavity size and charge distribution to encase OTf^- anions at the Zn metal surface to form β-CD@OTf^- dominated inner Helmholtz structure. Meanwhile, the electrochemically triggered β-CD@OTf^- decomposition could in situ convert to the organic-inorganic hybrid SEI (ZnF₂/ZnCO₃/ZnS‒(C-O-C/

SUBMITTER: Luo J 

PROVIDER: S-EPMC11291733 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature