LITHIUM SECONDARY BATTERY, AND METHOD FOR PRODUCING LITHIUM SECONDARY BATTERY

An object of the present disclosure is then to provide a lithium secondary battery with a lithium metal and/or a lithium alloy as a negative electrode active material, in which the lithium secondary battery is enhanced in capacity retention rate, reduced in resistance, and suppressed in short-circuit. A lithium secondary battery, wherein the lithium secondary battery comprises a negative electrode current collector layer, a negative electrode active material layer, a protective layer, an electrolyte layer, a positive electrode active material layer, and a positive electrode current collector layer in the listed order, the negative electrode active material layer contains a lithium metal or a first lithium alloy, and the protective layer contains a second lithium alloy different from the first lithium alloy.