| 摘要 |
According to the present invention, a fuel cell stack is formed by laminating multiple unit cells without a sealing material. Each of the unit cells includes: an electrode unit including an anode electrode, an electrolyte, and a cathode electrode; a metal support unit which is formed by sequentially bonding the anode electrode, an electrolyte, and an cathode electrode and lets a fuel gas pass through; and a cathode current collector which is separately arranged on the electrode unit to come in contact with the cathode electrode and lets an air gas to pass through. Accordingly, the unit cells can be replaced individually while not being attached to each other. The present invention implements a stack structure by laminating the unit cells without one sealing material by configuring each of the unit cells on include the electrode unit, a flat pipe support coated with the electrode unit, and the cathode current collector. The unit cells laminated in multiple layers can be easily inserted and released between fuel gas manifolds on both sides not to be attached to each other, thereby being replaced individually as a result. Accordingly, when the fuel cell stack malfunctions during an operation, the present invention can remove only the damaged unit cells and replace the damaged unit cells with new unit cells, thereby not requiring the entire fuel cell stack to be disposed when the unit cells on a part are damaged to increase the cost-effectiveness and efficiency. |
