| abstract |
A non-aqueous electrolyte secondary battery having high energy efficiency in a low input / output range required when a hybrid vehicle or the like is actually operating is provided. In a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, the negative electrode includes a lithium titanium composite oxide, and the solvent of the non-aqueous electrolyte is ethyl acetate, methyl acetate, butyl acetate, or propion. It contains at least one selected from the group consisting of ethyl acid and methyl propionate. [Selection figure] None |