MANUFACTURE OF SODIUM-SULFUR BATTERY

PURPOSE:To intend to reduce mechanical stress in a solid electrolyte and decrease internal resistance thereof by binding an electron conductive material, of which the central part is cleared away, on an inside wall of positive electrode vessel, then impregnating the electron conductive material with a positive electrode active substance and by inserting a solid electrolyte vessel, which is filled with a negative electrode active substance, into the central vacant part. CONSTITUTION:A molten sodium 2, a negative electrode active substance, is contained in an integrated vessel, comprising a solid electrolyte vessel 5, which is selectively conductive for sodium ions, and a negative vessel 1 with an insulating material 3. On the other hand, an electron conductive material 8, which is impregnated with a molten sulfur 7, an positive electrode active substance, constitutes a positive electrode structure 9, and it is contained in a positive electrode vessel 6. After the electron conductive material 8 is made to adhere to the inside wall of the positive electrode vessel 6, the electron conductive material 8 is calcined to be fixed on the inside wall of the positive electrode vessel 6 and impregnated with molten sulfur 7. In this state, the solid electrolyte vessel is inserted into the positive electrode structure, and then a positive electrode supplementary vessel 4, which is preliminarily joined to an insulation ring, is joined to the positive electrode vessel 6 at an end face 10 and sealed. With the arrangement, heat distortion of the positive electrode structure doesn't exert asymmetrical pressure on the solid electrolyte vessel and damage of the solid electrolyte during high temperature is reduced.