| 摘要 |
PROBLEM TO BE SOLVED: To provide a sodium-sulfur battery including a battery jar equipped with an enhanced anti-corrosiveness against sodium polysulfide. SOLUTION: At least one of a positive electrode lid 4 and a battery jar 9 is made of ferrite type stainless steel containing 10-35 wt.% chromium and at least one of 0.5-6.0% aluminum, 0.5-3.0% silicon and 0.5-4.0% molybdenum, and according to requirement, the stainless steel may further contain at least one of titanium, zirconium, niobium by 0.6% or less, and the surface is subjected to a chromizing treatment.
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