| abstract |
An object of the present invention is to provide a nonaqueous secondary battery having excellent high-temperature cycle characteristics and low-temperature output characteristics. The nonaqueous secondary battery of the present invention is a nonaqueous secondary battery having a positive electrode, a negative electrode, a separator, and an electrolyte, wherein at least one of the positive electrode, the negative electrode and the separator has a porous membrane, Wherein the electrolyte contains a nonaqueous solvent and a supporting electrolyte, and the nonaqueous solvent contains 50% by volume or more and 100% by volume or less of the propionic acid compound do. |