Patent ID: 7855026
Filing Date: 2010-12-21
Classification: H01M,Y02E,Y02P

Abstract:
1. A fuel cell stack comprising a cell stack constituted by a plurality of unit cells stacked together, said cell stack having a stack structure including two opposite sides, including a plus side and a minus side, the plus side including a first plurality of unit cells that comprise a whole plus side of the cell stack and the minus side including a second plurality of unit cells that comprise a whole minus side of the cell stack, the plus side of the cell stack having corrosion resistance higher than that of the minus side of the cell stack when viewed from a viewpoint of the whole cell stack, the plus side of the cell stack corresponding to a first zone of the cell stack where oxidation current occurs, the minus side of the cell stack corresponding to a second zone of the cell stack where no oxidation current occurs, wherein each unit cell has a separator on each end and at least one separator in at least one unit cell in the first zone of the cell stack has a corrosion resistance that is higher than a corrosion resistance of both of the separators for each unit cell in the second zone of the cell stack.