Nonaqueous electrolyte battery

摘要

A nonaqueous electrolyte battery includes a positive electrode, a negative electrode containing an active material providing a negative electrode working potential which is nobler than a lithium electrode potential, and whose potential difference from the lithium electrode potential is 0.5V or more, and an electrolyte containing molten salt, ester phosphate and metal salt including at least one of alkaline metal salt and alkaline earth metal salt, the electrolyte satisfying the following formula (1): 0.5<=(M₂/M₁)<=1 (1) where M₁ is a molar number of the metal salt and M₂ is a molar number of the ester phosphate.