| abstract |
A method for producing a sodium secondary battery having high capacity and excellent cycle characteristics is provided. An electrode group obtained by laminating or laminating or winding a positive electrode capable of doping and dedoping sodium ions, a negative electrode capable of doping and dedoping sodium ions, and a separator, and an electrolytic solution Is stored in the battery case, and then the battery case is sealed, and the electrolytic solution injection is divided into two or more times. [Selection figure] None |