Suppressed Electrolyte Decomposition Behavior to Improve Cycling Performance of LiCoO₂ under 4.6 V through the Regulation of Interfacial Adsorption Forces.

ABSTRACT: Alleviating the decomposition of the electrolyte is of great significance to improving the cycle stability of cathodes, especially for LiCoO₂ (LCO), its volumetric energy density can be effectively promoted by increasing the charge cutoff voltage to 4.6 V, thereby supporting the large-scale application of clean energy. However, the rapid decomposition of the electrolyte under 4.6 V conditions not only loses the transport carrier for lithium ion, but also produces HF and insulators that destroy the interface of LCO and increase impedance. In this work, the decomposition of electrolyte is effectively suppressed by changing the adsorption force between LCO interface and EC. Density functional theory illustrates the LCO coated with lower electronegativity elements has a weaker adsor

SUBMITTER: Sun C 

PROVIDER: S-EPMC11220708 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature