ELECTROLYTIC SOLUTION FOR NON-AQUEOUS ENERGY STORAGE DEVICE AND LITHIUM ION SECONDARY BATTERY

摘要

A lithium ion secondary battery that operates at a high voltage, has a high cycle life, and generates less gas, and an electrolytic solution for such a lithium ion secondary battery. An electrolytic solution for a non-aqueous energy storage device, comprising: a non-aqueous solvent; a lithium salt (A) having no boron atom; a predetermined lithium salt (B) containing a boron atom; and a compound (C) in which at least one of hydrogen atoms in an acid selected from the group consisting of proton acids having a phosphorus atom and/or a boron atom, sulfonic acids, and carboxylic acids is replaced with a substituent represented by formula (3):;;wherein R3, R4, and R5 each independently represent an organic group which has 1 to 10 carbon atoms and which may have a substituent.

主权项

1. An electrolytic solution for a non-aqueous energy storage device, comprising:
a non-aqueous solvent; a lithium salt (A) having no boron atom; a lithium salt (B) containing a boron atom represented by formula (1), formula (2), or a combination thereof:wherein X each independently represents a halogen atom selected from the group consisting of a fluorine atom, a chlorine atom, and a bromine atom; R1 each independently represents a hydrocarbon group which has 1 to 10 carbon atoms and which may have a substituent; a represents an integer of 0 or 1; and n represents an integer of 0 to 2;wherein X each independently represents a halogen atom selected from the group consisting of a fluorine atom, a chlorine atom, and a bromine atom; R2 each independently represents a hydrogen atom, a fluorine atom, or a hydrocarbon group which has 1 to 10 carbon atoms and which may have a substituent; and m represents an integer of 0 to 4; and
a compound (C) in which at least one of hydrogen atoms in an acid selected from the group consisting of proton acids having a phosphorus atom and/or a boron atom, sulfonic acids, silicic acids and carboxylic acids is replaced with a substituent represented by formula (3):wherein R3, R4, and R5 each independently represent an organic group which has 1 to 10 carbon atoms and which may have a substituent.