CHEMICAL THERMODYNAMIC STABILITIES OF ELECTRODE-ELECTROLYTE INTERFACES OF HIGH-TEMPERATURE ELECTROCHEMICAL-CELLS

The chemical stabilities of electrode-electrolyte interfaces have been investigated for the following two cases: (1) interaction between ytt ria-stabilized zirconia electrolyte and platinum electrode is selected as an example to confirm the validity of the present approach; (2) in teraction between beta ''-alumina electrolyte-molybdenum electrode in AMTEC (alkali metal thermoelectric convertor): the chemical potential diagrams for the Na-Al-Mo-O system have been constructed to examine th e transfer of sodium in the electrolyte-electrode interface vicinity a s functions of partial pressure of oxygen and sodium.