Non-aqueous liquid electrolyte for secondary battery and secondary battery

A kit of a non-aqueous liquid electrolyte for a secondary battery, wherein a chemical agent containing a compound (A) represented by any one of formulae (I-1) to (I-3) is combined with a chemical agent containing an electrolyte:

• wherein, in formula (I-1), X1 represents an alkyl group substituted with a halogen atom;
• Y1 represents a hydrogen atom or an organic group;
• and ma represents an integer from 1 to 6;
• wherein, in formula (I-2), X2 represents a group having an oxygen atom;
• Y2 represents a hydrogen atom or an organic group;
• and mb represents an integer from 1 to 6;
• and
• wherein, in formula (I-3), Y3 represents a structure represented by any one of formulas (Ex-1) to (Ex-5);
• and mc represents an integer from 1 to 6:
• wherein L1 is a single bond or a linking group;
• Ra an alkyl group, a halogen atom, or a fluorinated alkyl group;
• na is an integer from 0 to 2;
• nb is an integer from 1 to 3;
• Xa represents an oxygen atom or —CR2—;
• R represents a hydrogen atom or an alkyl group;
• Rb′ represents a cyclic hydrocarbon group having 4 to 20 carbon atoms in the case of mc=1, and Rb′ represents a hydrocarbon group having 4 to 20 carbon atoms in the case of mc=2 to 6;
• Rb′ may have a branched structure in the middle of the group, and a structure having -L1-* at the end thereof may be present;
• and * designates an atomic bonding,
• wherein said non-aqueous liquid electrolyte for a secondary battery further containing a compound (B) releasing, upon oxidation or reduction, an active species that reacts with the compound (A) represented by any one of formulae (I-1) to (I-3), and
• wherein the compound (B) comprises at least one compound selected from the group consisting of acetophenone compounds, benzophenone compounds, anthrone compounds, xanthone compounds, dibenzosuberone compounds, dibenzosuberenone compounds, anthraquinone compounds, bianthronyl compounds, bianthrone compounds, and dibenzoyl compounds.

An additive for a non-aqueous secondary battery liquid electrolyte, comprising a compound (A) represented by any one of formulae (I-1) to (I-3):

• wherein, in formula (I-1), X1 represents an alkyl group substituted with a halogen atom;
• Y1 represents a hydrogen atom or an organic group;
• and ma represents an integer from 1 to 6;
• wherein, in formula (I-2), X2 represents a group having an oxygen atom;
• Y2 represents a hydrogen atom or an organic group;
• and mb represents an integer from 1 to 6;
• and
• wherein, in formula (I-3), Y3 represents a structure represented by any one of formulas (Ex-1) to (Ex-5);
• and mc represents an integer from 1 to 6:
• wherein L1 is a single bond or a linking group;
• Ra an alkyl group, a halogen atom, or a fluorinated alkyl group;
• na is an integer from 0 to 2;
• nb is an integer from 1 to 3;
• Xa represents an oxygen atom or —CR2—;
• R represents a hydrogen atom or an alkyl group;
• Rb′ represents a cyclic hydrocarbon group having 4 to 20 carbon atoms in the case of mc=1, and Rb′ represents a hydrocarbon group having 4 to 20 carbon atoms in the case of mc=2 to 6;
• Rb′ may have a branched structure in the middle of the group, and a structure having -L1-* at the end thereof may be present;
• and * designates an atomic bonding,
• wherein said non-aqueous liquid electrolyte for a secondary battery further containing a compound (B) releasing, upon oxidation or reduction, an active species that reacts with the compound (A) represented by any one of formulae (I-1) to (I-3), and
• wherein the compound (B) comprises at least one compound selected from the group consisting of acetophenone compounds, benzophenone compounds, anthrone compounds, xanthone compounds, dibenzosuberone compounds, dibenzosuberenone compounds, anthraquinone compounds, bianthronyl compounds, bianthrone compounds, and dibenzoyl compounds.