Patent ID: 7195832

Claim:
A fuel cell comprising: a first cone, the first cone comprising: an electrolyte component having a first side and a second side; a first electrode component provided on the outside of the electrolyte component and contacting a first side of the electrolyte component; and a second electrode component provided on the inside of the electrolyte component and contacting a second side of the electrolyte component; a second cone, the second cone comprising: a second electrically conductive component which is provided inside the electrolyte component and in contact with the second electrode; and a third cone, the third cone comprising: a porous material component provided inside the second electrically conductive component and in contact with the second electrically conductive component; and wherein at least one of the components has a first cross-sectional profile at a first location and a second cross-sectional profile at a second location, the second location being separated from the first location, the first cross-sectional profile having a greater area than the second cross-sectional profile, the first and second cross-sectional profiles being linked by one or more surfaces of the component.