Non-aqueous electrolyte for lithium batteries and lithium batteries containing the same

Abstract

The present invention relates to an electrolyte for a lithium metal battery. When the electrolyte of the present invention is applied to a battery containing lithium metal as a negative electrode active material, it has few side effects, excellent stability, and can improve various performances of the battery.

Claims

1. The following chemical formula 1a 【Chemistry 1】 A solvent represented by and a lithium salt, The lithium salt has a concentration of 1.5 M to 4.0 M (mol / L), and the solvent represented by formula 1a is present in an amount of 50% to 100% by volume relative to 100% by volume of the total non-aqueous solvent. Non-aqueous electrolyte for lithium batteries.

2. The aforementioned lithium salt is lithium bis(fluorosulfonyl)imide. The non-aqueous electrolyte for lithium batteries according to claim 1.

3. A positive electrode containing a positive electrode active material, A negative electrode containing a negative electrode active material, A separation membrane interposed between the negative electrode and the positive electrode, A lithium battery comprising the non-aqueous electrolyte for lithium metal batteries described in claim 1.

4. The negative electrode active material is lithium metal. The lithium battery according to claim 3.

5. The lithium battery according to claim 3, wherein the negative electrode active material includes a silicon-based active material.

6. The lithium battery according to claim 3, wherein the positive electrode active material is one or more selected from the group consisting of composite oxides of a metal and lithium, such as cobalt, manganese, nickel, aluminum, iron, or a combination thereof.

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