Anion-Induced Interfacial Liquid Layers on LiCoO₂ in Salt-in-Water Lithium-Ion Batteries.

ABSTRACT: The incompatibility of lithium intercalation electrodes with water has impeded the development of aqueous Li-ion batteries. The key challenge is protons which are generated by water dissociation and deform the electrode structures through intercalation. Distinct from previous approaches utilizing large amounts of electrolyte salts or artificial solid-protective films, we developed liquid-phase protective layers on LiCoO₂ (LCO) using a moderate concentration of 0.5∼3 mol kg^-1 lithium sulfate. Sulfate ion strengthened the hydrogen-bond network and easily formed ion pairs with Li⁺, showing strong kosmotropic and hard base characteristics. Our quantum mechanics/molecular mechanics (QM/MM) simulations revealed that sulfate ion paired with Li⁺ helped s

SUBMITTER: Oh H 

PROVIDER: S-EPMC10206596 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature