Patent ID: 8097384

Claim:
A hybrid solid oxide fuel cell having a tubular, elongated, hollow, triangular active cross-section comprising an interconnection, air electrode, fuel electrode, and solid oxide electrolyte between the electrodes, which active triangular cross-section integrally transitions into at least one inactive flat cross-section with flattened parallel sides; each cross-section having channels therein which morph into and communicate with each other, for gas guidance within the same channel, at an interface section, without separate pieces, each communicating channel containing at least one open end, wherein, within the fuel cell, air feed tubes can pass from within the inactive cross-section to the active cross-section, wherein the active interior and exterior cross-section and channels are triangular and the inactive flat cross-section channels are selected from the group consisting of circular, triangular or oblong, and wherein the exterior cross sections also morph into each other.