Patent ID: 9406975
Filing Date: 2016-08-02
CPC Classification: H01M,Y02E,Y02T

Claim Text:
1. An alkali metal-sulfur-based secondary battery comprising: a positive electrode or a negative electrode containing at least one sulfur-based electrode active material selected from the group consisting of elemental sulfur, a metal sulfide, a metal polysulfide and an organic sulfur compound; an electrolyte solution containing a complex comprising a salt of an alkali metal and an ether compound represented by the following Formula 1: wherein R a counter electrode, which is a counter electrode of the positive electrode or the negative electrode, and contains the alkali metal, an alloy containing the alkali metal, carbon, or an active material which intercalates and deintercalates an ion of the alkali metal, wherein the electrolyte solution further contains, in addition to the complex, a solvent comprising a fluorine-based solvent or an ionic liquid, which does not chemically react with the alkali metal and an alkali metal polysulfide of the formula M a molar ratio of the solvent to the salt of the alkali metal salt is 0.50 or more and 6.0 or less, and a molar ratio of the salt of the alkali metal to the ether compound is 0.50 or more and not more than a value determined by the saturation concentration of the salt of the alkali metal in the ether compound.