Abstract:
A fuel cell stack (100) includes a plurality of cells (10) that are stacked in a stacking direction. Each cell (10) includes a power generating body (1) and a pair of separators (2). The separators (2) respectively are arranged on opposite surfaces of the power generating body (1) in the stacking direction. Each separator (2) includes a first surface (2a) and a second surface (2b). A titanium nitride layer (3) is formed on the first surface (2a), and a conductive carbon layer (4) is formed on the titanium nitride layer (3). A titanium nitride layer (3) is formed on the second surface (2b). Each separator (2) is in contact with the power generating body (1) via the titanium nitride layer (3) and the carbon layer (4) on the first surface (2a) and is in contact with one of the separators (2) of an adjacent cell (10) via the titanium nitride layer (3) on the second surface (2b).
Abstract:
A fuel cell stack (100) includes a plurality of cells (10) that are stacked in a stacking direction. Each cell (10) includes a power generating body (1) and a pair of separators (2). The separators (2) respectively are arranged on opposite surfaces of the power generating body (1) in the stacking direction. Each separator (2) includes a first surface (2a) and a second surface (2b). A titanium nitride layer (3) is formed on the first surface (2a), and a conductive carbon layer (4) is formed on the titanium nitride layer (3). A titanium nitride layer (3) is formed on the second surface (2b). Each separator (2) is in contact with the power generating body (1) via the titanium nitride layer (3) and the carbon layer (4) on the first surface (2a) and is in contact with one of the separators (2) of an adjacent cell (10) via the titanium nitride layer (3) on the second surface (2b).
Abstract:
A separator (20) is provided that has a metal substrate (30) and a conductive resin layer (32) on the surface of the metal substrate (30). The conductive resin layer (32) contains a resin (33) and a conductive substance (34, 34A, 34B) dispersed in the resin (33). The separator (20) is configured such that the proportion of the conductive substance (34,34A, 34B) to the resin (33) increases continuously from the metal substrate (30) toward the surface of the separator (20).
Abstract:
A separator (20) includes a base material (30) made of metal plate and a first layer (40) made of corrosion-resistant material and arranged on the entirety of one surface of the base material (30). The base material (30) includes extending projections (31) and extending recesses (32). The projections (31) and the recesses (32) are alternately arranged. The separator (20) includes a second layer (50) including a conductive particle (51) and a binder (52) that is made of plastic material, the second layer (50) being arranged only on a part of a surface of the first layer (40) corresponding to a top surface of the projections (31) of the base material (30). The conductive particle (51) is contained only in the second layer (50).
Abstract:
A coating forming device (10) forms a coating on a substrate (50), which is a component of a fuel cell separator, by thermal transfer. The device includes a lower die (20) and an upper die (30) each having a heating portion (21, 31). A pressing surface of the lower die (20) and a pressing surface of the upper die (30) are both formed by a heat-resistant elastic member (40).
Abstract:
A separator (12) includes a gas flow path forming body (16), which includes a substrate (18) made of stainless steel, a resin layer (20) arranged on the substrate (18), and a conductive layer (24) arranged on the surface of the resin layer (20). The resin layer (20) contains a filler (22), which has conductivity and greater hardness than an oxide film (18b) of the substrate (18). The conductive layer (24) contains graphite (26). The filler (22) extends through the oxide film (18b) of the substrate (18) and contacts the base material (18a).