| 摘要 |
PURPOSE:To suppress a danger to the minimum even when a solid electrolyte is damaged by surrounding the required surface or its vicinity of the solid electrolyte with a film of a shape-memory ceramics getting a non-porous state at an extremely high temperature. CONSTITUTION:A container 9 made of a shape-memory ceramics formed by cooling after being given deformation from a non-porous shape to a porous shape under an extremely high temperature to be generated at the time of direct reaction of a sodium negative electrode to a sulphur positive electrode caused by a damage of a solid electrolyte is formed into a bag tube form in a position covering one side surface of the solid electrolyte 3 of a sodium- sulphur cell. Then, just before starting of the danger of generating high temperature heat by a direct reaction of both electrode materials due to the damage of the electrolyte 3, the container 9 having enabled electron movement due to a porous form at an actuation temperature of the battery 3 changes into a non-porous state due to a high temperature while checking an outflow of sodium 1 thus to prevent the positive electrode container 4 from the danger of dissolution. |
