Solid oxide electrolyte membrane supported on doped silicon ribs for uses in micro solid-oxide fuel cells

Abstract

[EN] The invention relates to a solid oxide fuel cell comprising: (a) a substrate having at least one cavity for forming a membrane; (b) an electrolyte membrane based on a thin layer of a solid oxide of more than 5 nm but less than 5 mum in thickness, covering the cavity formed in the substrate; (c) a network of doped silicon ribs crossing the cavity just below the electrolyte membrane, such as to serve as a support for the electrolyte, said silicon ribs defining individual electrolyte membranes, the size of which is always greater than the thickness of the ribs and which together form the large-surface electrolyte membrane; and (d) two fine layers acting as electrodes, deposited on each side of the electrolyte membrane. The invention also relates to the method for producing said fuel cell.

[ES] La presente invención se refiere a una pila de combistible de óxido sólido que consta de: (a) un sustrato con al menos una cavidad para formar una membrana; (b) una membrana electrolítica basada en una capa delgada de un óxido sólido de más de 5nm pero menos de 5 mum de grosor, cubriendo la cavidad formada en el sustrato; (c) una red de nervios de silicio dopado cruzando la cavidad, justo por debajo de la membrana electrolítica, de forma que sirvan como soporte del electrolito; los nervios de silicio determinan membrana electrolítica de gran superficie; y (d) dos capas finas que actúan como electrodos, depositadas una a cada lado de la citada membrana electrolítica. Asimismo, es objeto de la invención en el método para fabricar dicha pila de combustible.