Anode container for sodium-sulfur battery and sodium-sulfur battery using the same

摘要

PURPOSE: To prevent the generation of break of each bonding part by forming a narrow part having the predetermined deformation strength to effectively absorb the distortion due to solidification of sodium polysulfide at the time of lowering the temperature of a battery and due to thermal expansion difference between a positive electrode container and a solid electrolyte tube. CONSTITUTION: This Na-S battery is formed of a cylindrical positive electrode container 6 for housing the conductive material 11 for positive electrode such as carbon felt impregnated with melted sulfur as the positive electrode active material and a cylindrical solid electrolyte tube 2 with the bottom for storing the melted metal Na 12 and for selectively transmitting Na. In this Na-S battery, an insulation ring 1 is inserted into the cylinder of a cylindrical fitting 7, which has a bottom 19 and a flange 19, and the ring is thermo-compression bonded at the bottom by the bonding agent 14, and the inner peripheral surface is bonded to the upper end by bonding glass 15. Since a narrow part 10 having the predetermined deformation strength is provided, distortion due to solidification of sodium polysulfide at the time of lowering the temperature and due to the thermal expansion difference between the positive electrode container 6 and the tube 2 is effectively absorbed.