| 摘要 |
The non-aqueous electrolyte for secondary batteries includes a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent. The non-aqueous solvent includes a fluorine-containing cyclic carbonate, propylene carbonate, and diethyl carbonate. The content WFCC of the fluorine-containing cyclic carbonate is 2 to 12 mass %, the content WPC of the propylene carbonate is 40 to 70 mass %, and the content WDEC of the diethyl carbonate is 20 to 50 mass % relative to the total of the non-aqueous solvent. The content of ethylene carbonate in the non-aqueous solvent may be 5 mass % or less.
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