SODIUM SECONDARY CELL

摘要

The present invention is a sodium secondary cell provided with a positive electrode in which a positive-electrode material containing a positive-electrode active substance reversibly containing sodium cations is supported on a positive-electrode current collector, a negative electrode in which a negative-electrode material containing a negative-electrode active substance reversibly containing sodium cations is supported on a negative-electrode current collector, an electrolyte interposed at least between the positive electrode and the negative electrode, and a separator for retaining the electrolyte and separating the positive electrode and the negative electrode; wherein the present invention pertains to a sodium secondary cell in which the negative-electrode active substance is amorphous carbon, and the electrolyte is a fused-salt electrolyte that is a compound of a salt comprising sodium cations and anions, and a salt comprising organic cations and anions.