NEGATIVE CURRENT COLLECTOR, PREPARATION METHOD OF THE SAME, SODIUM SECONDARY BATTERY, AND ELECTRICAL DEVICE

The present application provides a negative current collector and a preparation method thereof, a sodium secondary battery, and an electrical device. The negative current collector includes a matrix and a functional layer disposed on at least one side of the matrix and includes a multifunctional additive. The multifunctional additive includes NaMN*zHO, where: M includes an atom capable of forming an alloy with Na; N includes at least one of atom O, atom S, or atom Se; and 0