Method of manufacture of solid electrolytes for fuel cells

Abstract

Abstract A METHOD OF PREPARING OF SOLID ELECTROLYTES FOR FUEL CELLS BASED ON ZIROCONIA STABILIZED IN THE CUBIC PHASE, WHICH CONSISTS OF FIRST PREPARING AN INTIMATE MIXTURE OR A MIXED COMPLEX OF ORGANIC ZIRCONYL SALTS AND SALTS OF STABILIZING METALS, DECOMPOSING SAID SALTS BY PYROLYSIS BETWEEN 300* AND 950*C. AND PREFERABLY BETWEEN 300* AND 450*C., AND BRINGING THE PYROLYSIS PRODUCTS UP TO A TEMPERATURE BETWEEN 900* AND 1100*C. TO CRYSTALLIZE SAID SOLID SOLUTION AT A SUFFICIENT SIZE OF GRAIN, AND THEN PROJECTING SAID SOLID SOLUTION IN A FLAME AT A SUITABLE GRANULAR SIZE, ON TO A SUPPORT CONSTITUTED BY A POROUS CERAMIC MATERIAL OR BY A POROUS METAL TO DEPOSIT A THIN LAYER OF ELECTROLYTE ON SAID SUPPORT. THE ZIRCONYL SALTS AND THE SALTS OF THE OTHER STABILIZING METALS ARE SALTS OF CARBOCYLIC ACIDS (FORMATES, ACETATES, ETC.) OR OF POLYHYDROXY-CARBOXILIC ACID (TARTRATES, CITRATES, MANDELATES, ETC.).

Inventors

• 👤 Rene A Paris
• 👤 Guy Paris

Bibliographic Details