Sodium Secondary Battery having Graphite Felt

Sodium according to the present invention, a secondary battery is impregnated with a sodium ion-conducting solid electrolyte, the anode fluid and cathode fluid which is located in the cathode space is located in the cathode, the anode space containing sodium to separate the anode space and the cathode space, facing the solid electrolyte, It comprises an anode comprising a graphite felt, a groove is formed on the surface that are arranged parallel to each other.