NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

Disclosed is a nonaqueous electrolyte secondary battery comprising a positive electrode, a negative electrode and a nonaqueous electrolyte wherein the nonaqueous electrolyte contains an onium compound, a lithium salt and a chain carbonate having a C=C unsaturated bond. The onium compound is preferably composed of at least one compound selected from the group consisting of chain quaternary ammonium compounds, pyrrolidinium compounds and piperidinium compounds. The chain carbonate having a C=C unsaturated bond is preferably composed of at least one selected from the group consisting of diallyl carbonates and allyl phenyl carbonates.