Fuel cells having improved durability
View Patent ↗A fuel cell or a fuel cell stack component comprises an active area and a non-active area. A peroxide decomposing metal compound or metal alloy is disposed in or on the non-active area of a fuel cell or a fuel cell component. The metal compound or alloy is capable of providing a peroxide decomposing metal species that can migrate from the non-active area to an active area of a fuel cell. A fuel cell or membrane electrode assembly having a peroxide decomposing metal compound or alloy disposed in its non-active area exhibits improved durability.
1. A method of producing a fuel cell comprising:
providing fuel cell stack components including at least a cathode, an anode, a gas diffusion media, a bipolar plate and an ion conductive membrane, each having an active and non-active areas;
disposing a peroxide decomposing metal compound or metal alloy in said non-active area of at least one of said stack components and wherein the metal compound comprises an organometallic compound comprising at least one of a metal EDTA compound, a metal phthalocyanine, or a metal prophyrin.
2. A method of producing a fuel cell as set forth in claim 1 further comprising operating said fuel cell with reactant gases stream having a relative humidity of 10 to about 99%, causing migration of a peroxide decomposing metal ion or metal ion complex from said metal compound or metal alloy to an active area of the fuel cell.
3. A membrane electrode assembly comprising a peroxide decomposition metal compound disposed in the non-active area of the membrane electrode assembly and wherein the metal compound comprises an organometallic compound comprising at least one of a metal EDTA compound, a metal phthalocyanine, or a metal prophyrin.
4. A membrane electrode assembly as set forth in claim 3 , wherein said peroxide decomposition metal compound comprises an organometallic compound Ce.
5. A fuel cell gasket comprising a peroxide decomposing metal compound or alloy and wherein the metal compound comprises an organometallic compound comprising at least one of a metal EDTA compound, a metal phthalocyanine, or a metal prophyrin.
6. A fuel cell gasket as set forth in claim 5 , wherein said metal compound comprises an organometallic compound Ce.
7. A fuel cell gasket as set forth in claim 5 , wherein said metal compound is capable of providing a peroxide decomposing metal ion or metal ion complex that migrates to an active area of a fuel cell under a normal fuel cell operation.
8. A fuel cell gasket as set forth in claim 5 , wherein said metal compound or alloy is disposed on or in a plastic or rubber gasket material.
9. A membrane electrode assembly as set forth in claim 3 , wherein said peroxide decomposition metal compound comprises an organometallic compound comprising at least one of a metal EDTA compound, a metal phthalocyanine, or a metal prophyrin, wherein the metals comprise of at least one of Mn, Al, Mg, Zn, Co, V, Ru, Pd, Mo, Sn, Ce, W, Pt, Ir, Os or Ag elements.
10. A fuel cell gasket as set forth in claim 5 , wherein said metal compound comprises an organometallic compound comprising at least one of a metal EDTA compound, a metal phthalocyanine, or a metal prophyrin, wherein the metals comprise of at least one of Mn, Al, Mg, Zn, Co, V, Ru, Pd, Mo, Sn, Ce, or W elements.