| 摘要 |
PROBLEM TO BE SOLVED: To restrict the corrosion of a metal member on the oxidant side being generated during temprature rise at the starting operation. SOLUTION: At least one of members which are exposed to an oxygen containing atmosphere during operation and whose surface is wetted by fused electrolyte is formed of stainless steel with a chrome content of less than 23wt%. Mixed carbonate, which contains 45-65mol% lithium carbonate and in which other sodium carbonate than lithium carbonate accounts for 50mol% or more, is used for electrolyte. The electrolyte is contained in a collecting plate 8 on the oxidant electrode side or in pores in an oxidant electrode 3 during staring operation. In a temperature rise process at starting operation, oxygen partial pressure in the atmosphere contacted by the oxidant electrode is kept to be 0.01atm or less or 0.08atm-0.12atm or carbon dioxide partial pressure is kept to be 0.05atom or less, for all period or at least 30 minutes from the melting point of the electrolyte to any battery temperature, higher than the melting point and 570 deg.C or less. |
