| abstract |
The present invention provides a sodium secondary battery that is superior in stability to charge / discharge characteristics as compared with the prior art. A positive electrode capable of doping and dedoping sodium ions, a negative electrode capable of doping and dedoping sodium ions, and an electrolyte, and comprising at least one of electrodes selected from the positive electrode and the negative electrode A sodium secondary battery, wherein an insulating inorganic porous layer is formed on a surface. The sodium secondary battery as described above, wherein the insulating inorganic porous layer is a layer containing an inorganic filler and a binder. [Selection figure] None |