| 摘要 |
PURPOSE:To produce a unit cell, the characteristic of which is not changed even if reaction gases are switched to each other for operation, by using electrodes symmetrical with respect to a matrix layer for both electrodes. CONSTITUTION:For the basic constitution of a unit cell, reaction gas passages 4a, 4b are formed on ribbed electrodes 3a, 3b, and catalyst layers 2a, 2b are formed on the opposite faces to the reaction gas passages 4a, 4b of the ribbed electrodes 3a, 3b respectively. When a fuel gas was fed through 4a of the unit cell and an oxidizer gas was fed through 4b for an electromotive test, a result shown by a solid line in the figure was obtained. Likewise, when the oxidizer gas was fed through 4a and the fuel gas was fed through 4b, a result shown by a dotted line in the figure was obtained. Accordingly, in the unit cell having the so called symmetrical air electrode and fuel electrode, the cell performance is not deteriorated even if the reaction gases are switched to each other for operation, thus indicating that the switching is feasible. |
