JP2014017111A5

JP2014017111A5 -

Info

Publication number: JP2014017111A5
Application number: JP2012153485A
Authority: JP
Filing date: 2012-07-09
Publication date: 2015-07-30
Anticipated expiration: 2032-07-09

Claims

A positive electrode having a sulfur-based electrode active material comprising at least one selected from the group consisting of elemental sulfur, metal sulfides, metal polysulfides, and organic sulfur compounds;
Following formula

(Here, R ₁ is any _one of an alkyl group having 1 to 9 carbon atoms which may be substituted with a fluorine atom, a phenyl group which may be substituted with a halogen atom, or a cyclohexyl group which may be substituted with a halogen atom. R ₂ is an alkyl group having 1 to 9 carbon atoms which may be substituted with fluorine, a phenyl group which may be substituted with a halogen atom, a cyclohexyl group which may be substituted with a halogen atom, or ethyl One of the groups),

(Here, R ₃ and R ₄ are each an alkyl group optionally substituted with 1 to 9 carbon atoms, a phenyl group optionally substituted with a halogen atom, or a cyclohexyl optionally substituted with a halogen atom. One of the groups),

(Here, R ₅ and R ₆ are each an alkyl group optionally substituted with 1 to 9 carbon atoms, a phenyl group optionally substituted with a halogen atom, or a cyclohexyl optionally substituted with a halogen atom. One of the groups), or

(Here, R ₇ is an alkyl group having 1 to 9 carbon atoms which may be substituted with a fluorine atom, a phenyl group which may be substituted with a halogen atom, or a cyclohexyl group which may be substituted with a halogen atom. And at least a part of the glyme and the alkali metal salt forms a complex , and the alkali metal and the alkali metal polysulfide (M ₂ S _n: and 1 ≦ n ≦ 8) and reaction was not fluorinated solvent, electrolyte containing one or more selected from the group of ionic liquids, and hydrocarbons,
A counter electrode of the positive electrode, the negative electrode having the alkali metal, the alloy containing the alkali metal, or carbon;
With
An alkali metal-sulfur secondary battery in which a mixing ratio of the alkali metal salt to the glyme is 0.80 or more in terms of mole and not more than a value determined by a saturation concentration of the alkali metal salt in the glyme.

The alkali metal salt is represented by MX, where M is an alkali metal, X is Cl, Br, I, BF ₄ , PF ₆ , CF ₃ SO ₃ , ClO ₄ , CF ₃ CO ₂ , AsF ₆ , SbF. ₆ , AlCl ₄ , N (CF ₃ SO ₂ ) ₂ , N (CF ₃ CF ₂ SO ₂ ) ₂ , PF ₃ (C ₂ F ₅ ) ₃ , N (FSO ₂ ) ₂ , N (FSO ₂ ) (CF ₃ SO ₂ ), N (CF ₃ CF ₂ SO ₂ ) ₂ , N (C ₂ F ₄ S ₂ O ₄ ), N (C ₃ F ₆ S ₂ O ₄ ), N (CN) ₂ , N (CF ₃ SO ₂ ) (CF ₃ CO), R ¹ FBF ₃ (where R ¹ F = n-C _m F _{2m + 1} , m = 1 to 4 natural number) and R ² BF ₃ (where R ² = n−C _2. The alkali metal-sulfur secondary battery according to claim 1, which is at least one selected from the group consisting of (pH _{2p + 1} , p = 1 to 5).

Following formula

(Here, R ₃ and R ₄ are each an alkyl group optionally substituted with 1 to 9 carbon atoms, a phenyl group optionally substituted with a halogen atom, or a cyclohexyl optionally substituted with a halogen atom. One of the groups), or

(Here, R ₅ and R ₆ are each an alkyl group optionally substituted with 1 to 9 carbon atoms, a phenyl group optionally substituted with a halogen atom, or a cyclohexyl optionally substituted with a halogen atom. A grime represented by any one of the groups),
An electrolyte solution for a secondary battery, comprising an alkali metal salt, wherein at least a part of the glyme and the alkali metal salt forms a complex.