| 摘要 |
Provided is a non-aqueous secondary battery that can operate properly in a wide temperature range from high temperature to low temperature. The non-aqueous secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte containing a lithium salt and an organic solvent, characterized by containing a lactone having a substituent at the α position as the organic solvent in the non-aqueous electrolyte and by having composition (A) or (B) below: (A) Of the total amount of the organic solvent contained in the non-aqueous electrolyte, the content of the lactone having the substituent at the α position is not less than 20 weight percent; (B) The negative electrode contains at least one of (1) and (2) below as a negative-electrode active material: (1) An element that can be alloyed with lithium, or a compound thereof; (2) A carbon material with an inter-plane spacing of 002 planes, d002, greater than 0.340 nm. |
