2 2 2 Negative Electrode Material for Sodium Secondary Battery and Method for Producing Same Negative Electrode for Sodium Secondary Battery and Sodium Secondary Battery

摘要

Disclosed is a negative electrode material for a sodium secondary battery which can exhibit excellent cycle characteristics while maintaining a high discharge capacity, a method for producing the same, and a negative electrode and a sodium secondary battery for a sodium secondary battery. (Solution) The negative electrode material for a sodium secondary battery of the present invention is composed of a sulfide or sulfide complex containing sulfur and antimony, and further includes the following component (i), if necessary. (i) at least one or more elements selected from the group consisting of Sn, As, Bi, Ge, Ga, Pb and C; When the component (i) is contained, the proportion of each of the above components is 10 to 70 mol% of sulfur, 10 to 70 mol% of antimony, and 3 to 60 mol% of (i).