| 摘要 |
PURPOSE:To increase utilization factor of positive active material by arranging a porous metal which is corroded by sulfur between a cathode electric conductive material and solid electrolyte. CONSTITUTION:A metallic material 9 at least whose surface is changed to sulfide is arranged between a solid electrolyte tube 1 and a cathode electric conductive material 6. Passages in which sodium ions can move to a cathode active material 5 are formed in the metallic material 9. To forming these passages, the metallic material is formed in porous form such as fiber, textile fabric, sinter, plate-shaped fibrous body or sinter or net having numberless holes or slits. The metallic material 9 consists of metal of alloy such as aluminium, copper, nickel, iron, zinc, tin, stainless steel, or magnetisum whose surface or the entire part is corroded by sulfur or sodium polysulfide, but iron is most preferable among them. |
