Lithium secondary battery

摘要

A lithium secondary battery of the present invention includes: a positive electrode; a negative electrode; a nonaqueous electrolytic solution; and a separator. The positive active material contains a lithium-containing composite oxide containing nickel. A molar ratio of a total nickel amount with respect to a total lithium amount contained in the entire positive active material is 0.05 to 1.0. The nonaqueous electrolytic solution contains 0.5 to 5.0 mass % of a phosphonoacetate-based compound represented by the following General Formula (1). In the Formula, R1, R2, and R3 independently represent an alkyl group, an alkenyl group, or an alkynyl group having 1 to 12 carbon atoms, which may be substituted by a halogen atom, and “n” represents an integer of 0 to 6.;

主权项

1. A lithium secondary battery, comprising: a positive electrode; a negative electrode; a nonaqueous electrolytic solution; and a separator,
wherein the positive electrode includes a collector and a positive electrode material mixture layer formed on the collector, the positive electrode material mixture layer includes a positive active material, a conductive agent, and a binder, the positive active material contains a lithium-containing composite oxide containing nickel, wherein a molar ratio of a total nickel amount with respect to a total lithium amount contained in the entire positive active material is 0.05 to 1.0, and the nonaqueous electrolytic solution contains 0.5 to 5.0 mass % of a phosphonoacetate-based compound represented by the following General Formula (1): in the General Formula (1), R1 and R2 independently represent an alkyl group, an alkenyl group, or an alkynyl group having 1 to 12 carbon atoms, which may be substituted by a halogen atom, R3 represents an alkynyl group, and “n” represents an integer of 0 to 6.