Anion-enrichment interface enables high-voltage anode-free lithium metal batteries.

ABSTRACT: Aggressive chemistry involving Li metal anode (LMA) and high-voltage LiNi_0.8Mn_0.1Co_0.1O₂ (NCM811) cathode is deemed as a pragmatic approach to pursue the desperate 400 Wh kg^-1. Yet, their implementation is plagued by low Coulombic efficiency and inferior cycling stability. Herein, we propose an optimally fluorinated linear carboxylic ester (ethyl 3,3,3-trifluoropropanoate, FEP) paired with weakly solvating fluoroethylene carbonate and dissociated lithium salts (LiBF₄ and LiDFOB) to prepare a weakly solvating and dissociated electrolyte. An anion-enrichment interface prompts more anions' decomposition in the inner Helmholtz plane and higher reduction potential of anions. Consequently, the anion-derived interface chemistry con

SUBMITTER: Mao M 

PROVIDER: S-EPMC9968319 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature