Electrolyte design combining fluoro- with cyano-substitution solvents for anode-free Li metal batteries.

ABSTRACT: Fluoro-substitution solvents have achieved great success in electrolyte engineering for high-energy lithium metal batteries, which, however, is beset by low solvating power, thermal and chemical instability, and possible battery swelling. Instead, we herein introduce cyanogen as the electron-withdrawing group to enhance the oxidative stability of ether solvents, in which cyanogen and ether oxygen form the chelating structure with Li⁺ not notably undermining the solvating power. Cyano-group strongly bonds with transition metals (TMs) of NCM811 cathode to attenuate the catalytic reactivity of TMs toward bulk electrolytes. Besides, a stable and uniform cathode-electrolyte interphase (CEI) inhibits the violent oxidation decomposition of electrolytes and guarantees the structural int

SUBMITTER: Mao M 

PROVIDER: S-EPMC10835072 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature