Molten sodium battery and partition wall for molten sodium battery

A molten sodium battery comprising:

• molten sodium making an anode active material:
• a cathode active material:
• a sodium container accommodating the molten sodium therein:
• a partition wall including an anode chamber in an interior thereof:
• and
• a cathode container air-tightly accommodating the cathode active material and the partition wall therein, the molten sodium. battery further comprising:
• the cathode container including joint which. has an opening communicating an inside of the cathode container with an outside thereof, and made of a metal:
• and
• the partition wall comprising:
• a partition-wall body within the cathode container having a plate shape which comprises the anode chamber at around central site thereof in a thickness direction thereof, and a through bore connecting the anode chamber with an outside of the anode chamber, and made of beta-alumina:
• and
• a head fitted into the opening in the joint and bonded integrally with the partition-wall body which is communicated with the anode chamber way of the through bore, comprising a passage bore and a groove wherein the lower end of the passage bore opens and an end portion of the partition-wall body in which the through bore is formed is mounted in the groove.