Solid oxide fuel cells with novel internal geometry

Details Solid oxide fuel cells with novel internal geometry Solid oxide fuel cells with novel internal geometry

H - Electricity

01

M

H01M 4/96 (2006.01)

Patent

CA 2535005

Fuel electrode-anode supported type solid oxide fuel cells (SOFC) comprise novel fuel electrode design with improved mechanical and electrochemical properties. The novel supporting anodes comprise a plurality of internal longitudinal elevations or bosses projecting inwardly into the central bore of the tubular body for structural reinforcement of the entire cell, increasing electrode surface area, optimizing the anode electronic conductivity, and facilitating the mounting of the cell into a SOFC assembly system (e.g., cell stack). The SOFCs of the invention contemplate a range of tubular configurations, including cylindrical and polygonal shapes having at least three surfaces. Low-cost manufacturing routes are also disclosed, whereby the protruding bosses in the anode support do not require additional processing steps compared to conventional forming techniques.

La présente invention concerne des piles à combustible à oxyde solide (solid oxide fuel cells / SOFC) du type à support électrode-anode combustible, ayant une nouvelle conception d'électrode combustible de propriétés mécaniques et électrochimiques améliorées. Les anodes de support de l'invention comprennent une pluralité d'élévations longitudinales internes ou de bosses qui dépassent vers l'intérieur d'un orifice central pratiqué dans le corps tubulaire, afin de renforcer la structure de la pile dans son intégralité, d'augmenter la surface de l'électrode, d'optimiser la conductivité électronique de l'anode, et de faciliter le montage de la pile dans un système de SOFC (par exemple un empilement de piles). Les SOFC de l'invention prennent une large gamme de configurations tubulaires comprenant les formes cylindriques et polygonales présentant au moins trois faces. L'invention concerne aussi des modes de réalisation à faible coût, les bosses du support anodique n'impliquant pas d'étape de traitement supplémentaire en comparaison avec les techniques de réalisation conventionnelles.

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