Electrolytic solution and non-aqueous electrolytic solution secondary battery
The present invention provides an electrolytic solution that is less likely to cause a decrease in discharge capacity even under high-current conditions and enables high capacity retention, and a non-aqueous electrolytic solution secondary battery including the electrolytic solution. Provided is an electrolytic solution containing a carboxylic acid ester; and a hydroxy group-containing compound and/or an ether group-containing compound, the electrolytic solution containing the hydroxy group-containing compound and/or the ether group-containing compound in an amount of 50 mass ppm or less.
1 . An electrolytic solution comprising:
a carboxylic acid ester;
a hydroxy group-containing compound; and
an ether group-containing compound,
the electrolytic solution comprising the hydroxy group-containing compound and the ether group-containing compound in a total amount of 50 ppm or less and having a mass ratio of the hydroxy group-containing compound to the ether group-containing compound of 0.1 or greater and 10 or less,
wherein the carboxylic acid ester has a structure represented by the general formula R—COOR′ wherein R represents a hydrogen atom or a C1-C10 linear or branched hydrocarbon group, and R′ represents a C1-C10 linear or branched hydrocarbon group,
the hydroxy group-containing compound is a primary alcohol, and
the ether group-containing compound contains a diether compound.
2 . The electrolytic solution according to claim 1 ,
wherein the amount of the carboxylic acid ester is 3% by mass or greater and 40% by mass or less.
3 . The electrolytic solution according to claim 1 ,
wherein the diether compound has a carbon number of 3 or greater and 10 or less.
4 . The electrolytic solution according to claim 1 ,
wherein the diether compound has a structure in which two ether groups bind to the same carbon.
5 . A non-aqueous electrolytic solution secondary battery comprising the electrolytic solution according to claim 1 .