Method of preparation of electrodes for galvanic high-temperature fuel cells having solid electrolytes

Abstract

Abstract A method for the preparation of electrodes for galvanic fuel cells having solid porous surfaced electrolytes conducting ions, these cells operating at high temperatures and having electrodes made of metals and/or conductive oxides, wherein oxides are selected as starting materials and these are then connected to the porous surface of the electrolyte at high temperature either in a solid-solid or liquid-solid reaction. In one embodiment of the method, copper in powder form is applied to the porous surface of the electrolyte and heated in air to the fusion point causing infusion thereof in the form of copper oxide. The copper oxide can then be reduced immediately to form the metal or such reduction can be permitted to take place later in the cell under the influence of the hydrogen gas used in the cell. In another embodiment of the method, utilized when the oxides have a high melting point, the porous surface of the solid electrolyte is impregnated several times with a metallic salt solution such as a nickel nitrate solution and roasted after each such impregnation at a temperature of 500* C. to establish the oxide. This oxide is thereafter reacted with the solid electrolyte by further heat treatment at a temperature of 1800* C. to produce the electrode.

Inventors

• 👤 Arnold Isenberg
• 👤 Wilfried Pabst
• 👤 Gerd Sandstede

Bibliographic Details