A kind of electrolyte solution for lithium secondary battery containing solid electrolyte and application thereof

Abstract

The invention discloses a lithium secondary battery electrolyte solution containing a solid electrolyte and an application thereof. The lithium secondary battery electrolyte solution includes a lithium salt and a non-aqueous organic solvent, and the non-aqueous organic solvent is an ether compound and / or A non-ether organic substance with a polarity less than ether, the non-aqueous organic solvent does not dissolve the solid electrolyte and does not react with the solid electrolyte. The electrolyte solution for lithium secondary batteries containing solid electrolyte provided by the present invention can be used as the electrolyte solution of lithium secondary batteries, and can also be used as an additive for solid-state batteries, which can improve ion conduction and reduce interface impedance. Thereby effectively improving the performance of solid-state batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium secondary batteries, and in particular relates to an electrolyte solution for lithium secondary batteries containing a solid electrolyte and an application thereof. Background technique [0002] With the rapid development of solid-state electrolytes, various types of solid-state electrolyte materials such as sulfide electrolyte materials, oxide electrolyte materials, and halide electrolyte materials have been developed. Among them, the ionic conductivity of halide solid-state electrolytes can be as high as 2.05× 10 -3 S / cm (Angew.Chem.Int.Ed.2019, 58, 1-8), the material is compatible with commonly used commercial oxide cathode materials such as LCO, NMC, etc., which is expected to realize the commercial application of all-solid-state secondary batteries value. [0003] In the current lithium secondary battery system, the solid-state battery uses a new solid-state electrolyte to replace the curre...

AI Technical Summary

Problems solved by technology

[0009] In summary, ionic liquids and common electrolytes are mostly used in the prior art. Due to the chemical instability of sulfides, they are easy to react with polar solvents, and halide solid electrolytes are also easy to react with ionic liquids and conventional electrolytes. Find a stable solvent with solid electrolytes and prepare new electrolytes

Images