| abstract |
The present invention provides a non-aqueous electrolyte for a secondary battery, which is a non-aqueous electrolyte containing at least a non-aqueous solvent and a lithium salt, wherein the non-aqueous electrolyte contains 1,3-propanesultone and difluorophosphate, the content of the 1,3-propanesultone in the whole non-aqueous electrolyte is in the range of 0.001% by mass to 5% by mass, and the content of the difluorophosphate in the whole non-aqueous electrolyte The content is 10 ppm or more. |