A membrane electrode assembly including an ionically conductive member, an electrode, and an electrically conductive member including an active layer, wherein the electrode is a smooth, continuous layer that completely covers and supports the ionically conductive member. The electrode and active lay
A membrane electrode assembly including an ionically conductive member, an electrode, and an electrically conductive member including an active layer, wherein the electrode is a smooth, continuous layer that completely covers and supports the ionically conductive member. The electrode and active layer further include a first and second catalyst content, respectively; and 50% of the total catalyst content is present in the electrode and 50% of the total catalyst content is present in the active layer.
대표청구항▼
What is claimed is: 1. An assembly for a fuel cell comprising: an ionically conductive membrane having a major surface; an electrically conductive member facing said membrane major surface and having an active layer, said active layer having an active layer catalyst content; and an electrode betwee
What is claimed is: 1. An assembly for a fuel cell comprising: an ionically conductive membrane having a major surface; an electrically conductive member facing said membrane major surface and having an active layer, said active layer having an active layer catalyst content; and an electrode between said ionically conductive membrane and said electrically conductive member, said electrode having a major surface at said membrane major surface, and said electrode having an electrode catalyst content, wherein said electrode has a peripheral extent substantially the same as the membrane and wherein said electrode further comprises a central region and a peripheral region, said central region having a first group of catalyzed particles dispersed in a binder, said peripheral region having a second group of particles dispersed in a binder that are catalyzed or uncatalyzed, said peripheral region overlapping a peripheral extent of said active layer, and said central region being within said peripheral extent of said active layer; wherein said peripheral region is electrically non-conductive. 2. An assembly for a fuel cell comprising: an ionically conductive membrane having a major surface; an electrically conductive member facing said membrane major surface and having an active layer, said active layer having an active layer catalyst content; and an electrode between said ionically conductive membrane and said electrically conductive member, said electrode having a major surface at said membrane major surface, and said electrode having an electrode catalyst content, wherein said electrode has a peripheral extent substantially the same as the membrane and wherein said electrode further comprises a central region and a peripheral region, said central region having a first group of catalyzed particles dispersed in a binder, said peripheral region having a second group of particles dispersed in a binder that are catalyzed or uncatalyzed, said peripheral region overlapping a peripheral extent of said active layer, and said central region being within said peripheral extent of said active layer; wherein the first group of particles is dispersed in an ionically conductive binder, and said second group of particles is dispersed in an ionically non-conductive binder. 3. A membrane electrode assembly comprising: an ionically conductive membrane having a major surface; an electrode at said major surface, said electrode defining a continuous layer supporting said membrane; and an electrically conductive member adjacent said electrode and including an active layer; wherein at least one of said electrode and said active layer comprise a central region and a peripheral region; a gradient of electrochemically active material exists between said central region and said peripheral region such that a content of said electrochemically active material is greater in said central region than said peripheral region, wherein said peripheral region is separate and distinct from a sealing member. 4. The membrane electrode assembly according to claim 3, wherein said central region includes a first group of particles that are electrically conductive, and said peripheral region includes a second group of particles that are electrically non-conductive. 5. The membrane electrode assembly according to claim 3, wherein said electrode provides structural support to said membrane and thereby restricts movement of said membrane. 6. The assembly according to claim 3, wherein said central region comprises an ionically conductive binder retaining electrically conductive particles and an active material. 7. The assembly according to claim 3, wherein said peripheral region comprises an ionically non-conductive binder retaining said electrically non-conductive particles and said active material. 8. The assembly according to claim 3, wherein said peripheral region further comprises thermally conductive material. 9. The assembly according to claim 7, wherein said ionically non-conductive binder is a thermoplastic resin. 10. The assembly according to claim 3, wherein said electrode and said active layer further comprise a first catalyst content and a second catalyst content, respectively; and said first catalyst content includes 50% of the total catalyst content of the assembly, and said second catalyst content includes 50% of the total catalyst content of the assembly. 11. The assembly according to claim 3, wherein said electrically conductive member further comprises an intermediate layer comprising carbon particles dispersed in a binder that couples said active layer and said electrically conductive member. 12. The assembly according to claim 11, wherein said intermediate layer is a water management layer.
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이 특허에 인용된 특허 (11)
Bhaskar, Sompalli; Gasteiger, Hubert; Litteer, Brian A., Catalyst layer edge protection for enhanced MEA durability in PEM fuel cells.
Barton Russell H.,CAX ; Gibb Peter R.,CAX ; Ronne Joel A.,CAX ; Voss Henry H.,CAX, Membrane electrode assembly for an electrochemical fuel cell and a method of making an improved membrane electrode assembly.
LaConti, Anthony B.; Swette, Larry L., Proton exchange membrane (PEM) electrochemical cell having an integral, electrically-conductive, resiliently compressible, porous pad.
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