abstract |
A non-aqueous electrolyte solution for a non-aqueous electrolyte secondary battery excellent in low-temperature discharge characteristics, large current discharge characteristics, high-temperature storage characteristics, and cycle characteristics is provided. A non-aqueous electrolyte solution used in a non-aqueous electrolyte secondary battery comprising a negative electrode and a positive electrode capable of occluding and releasing metal ions, and a non-aqueous electrolyte solution. From a compound containing an electrolyte and a non-aqueous solvent, and at least one of hydrogen atoms of phosphoric acid, phosphorous acid, boric acid, sulfuric acid, and dicarboxylic acid is substituted with a group represented by the following general formula (1) It contains at least one selected from the group consisting of, and further contains monofluorophosphate and / or difluorophosphate. (M is Si, Ge, Sn or a carbon atom. R 1 to R 3 are a hydrogen atom, a halogen atom, or a hydrocarbon group having 1 to 10 carbon atoms which may have a halogen atom.) [Selection figure] None |