New Patent Application: Electrode Having Solid Electrolyte Interface And Secondary Battery Using The Same

Original Assignee: LG Chem, Ltd.

Application number: 13/043,722
Publication number: US 2011/0159378 A1 Filing date: Mar 9, 2011

from the abstract: Disclosed is an electrode having a solid electrolyte interface (SEI) film partially or totally formed on a surface thereof, the SEI film being formed by electrical reduction of a cyclic diester compound and a sulfinyl group-containing compound. Further, a secondary battery comprising the electrode is disclosed.

from the climes: A secondary battery comprising a cathode, an anode and an electrolyte, wherein the electrolyte comprises an electrolyte salt and an electrolyte solvent, the electrolyte further comprising both a cyclic diester compound and a sulfinyl group-containing compound; and/or the cathode or the anode is the electrode having a solid electrolyte interface (SEI) film partially or totally formed on a surface thereof, the SEI film being formed by electrical reduction of a cyclic diester compound and a sulfinyl group-containing compound, wherein the cyclic diester compound is not lactide.

Wherein the cyclic diester compound and the sulfinyl group-containing compound have the difference tolerance of 0 to 0.5V & of 0 to 0.3V in reduction potentials vs. Li+/Li.

cyclic diester

sulfonyl (S=O) group containing compounds

 

 

 

 

 it might be: glycolide, methyl

glycolide, lactide, tetramethyl

glycolide, fluoroglycolide, vinyl-

glycolide etc.

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