Patent ID: 11961968
Assignee: NISSAN CHEMICAL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A lithium ion secondary battery comprising a nonaqueous electrolyte solution, and a positive electrode and a negative electrode capable of occluding and releasing lithium,
wherein the nonaqueous electrolyte solution comprises an (A) electrolyte, a (B) nonaqueous organic solvent, and a (C) compound represented by any of the following formulas (2) to (4), and
the lithium ion secondary battery charged in a range of 4.35 to 5 V for use;, wherein R1 and R2 each independently represent a hydrogen atom, a monovalent aliphatic hydrocarbon group having 1 to 60 carbon atoms, which is optionally substituted with Z1, a monovalent aromatic hydrocarbon group having 6 to 60 carbon atoms, which is optionally substituted with Z2, or a monovalent heterocyclic ring-containing group having 2 to 60 carbon atoms, which is optionally substituted with Z2, wherein R1 and R2 do not include sec-butyl;
R3 to R6 each independently represent a hydrogen atom, a monovalent aliphatic hydrocarbon group having 1 to 60 carbon atoms, which is optionally substituted by Z1, a monovalent aromatic hydrocarbon group having 6 to 60 carbon atoms, which is optionally substituted by Z2, a monovalent heterocyclic ring-group having 2 to 60 carbon atoms, which is optionally substituted with Z2, a halogen atom, a hydroxy group, a nitro group, a cyano group, a boronic acid group, a sulfonic acid group, a phosphoric acid group, a silyl group, a thiol group, —O—RA, —O—C(═O)—RB, or —C(═O)—O—RC, and RA, RB, and RC each independently represent a monovalent aliphatic hydrocarbon group having 1 to 60 carbon atoms, which is optionally substituted with Z1, a monovalent aromatic hydrocarbon group having 6 to 60 carbon atoms, which is optionally substituted with Z2, or a monovalent heterocyclic ring-containing group having 2 to 60 carbon atoms, which is optionally substituted with Z2;
Z1 represents a halogen atom, an amino group, a hydroxy group, a nitro group, a cyano group, an oxo group, a carboxy group, a sulfo group, a phosphoric acid group, a thiol group, a silyl group, or a monovalent aromatic hydrocarbon group having 6 to 60 carbon atoms or a monovalent heterocyclic ring-containing group having 2 to 60 carbon atoms, which is optionally substituted with Z3;
Z2 represents a halogen atom, an amino group, a hydroxy group, a nitro group, a cyano group, an oxo group, a carboxy group, a sulfo group, a phosphoric acid group, a thiol group, a silyl group, or a monovalent aliphatic hydrocarbon group having 1 to 60 carbon atoms, which is optionally substituted with Z3;
Z3 represents a halogen atom, an amino group, a hydroxy group, a nitro group, a cyano group, an oxo group, a carboxy group, a sulfo group, a phosphoric acid group, a silyl group, or a thiol group; and
the broken line is a bond.