摘要:
A membrane electrode assembly includes an anode; a cathode; a membrane disposed between the anode and the cathode; and a protective layer positioned between the membrane and the cathode, the protective layer having a first side and a second side and being adapted to restrict migration of oxygen at the first side and to restrict the migration of hydrogen at the second side and thereby maintain a plane of potential change between the anode and the cathode within the protective layer.
摘要:
A membrane electrode assembly is provided which includes an anode; a cathode; a membrane between the anode and the cathode; and a protective layer between the membrane and at least one electrode of the anode and the cathode, the protective layer having a layer of ionomer material containing a catalyst, the layer having a porosity of between 0 and 10%, an ionomer content of between 50 and 80% vol., a catalyst content of between 10 and 50% vol., and an electrical connectivity between catalyst particles of between 35 and 75%. A configuration using a precipitation layer to prevent migration of catalyst ions is also provided.
摘要:
A membrane electrode assembly includes an anode; a cathode; a membrane disposed between the anode and the cathode; and an extended catalyzed layer between the membrane and at least one electrode of the anode and the cathode. The extended catalyzed layer includes catalyst particles embedded in membrane material and preferably includes a first plurality of particles which are electrically connected to the at least one electrode. The extended catalyzed layer may further preferably have a second plurality of particles which are electrically disconnected from the at least one electrode.
摘要:
A membrane electrode assembly includes an anode, a cathode, a membrane disposed between the anode and the cathode, a catalyzed layer in at least one position selected from the group consisting of between the cathode and the membrane and between the anode and the membrane, and an edge seal positioned along an edge of the membrane electrode assembly, wherein the membrane and the catalyzed layer extends into the edge seal.
摘要:
A membrane electrode assembly is provided which includes an anode; a cathode; a membrane between the anode and the cathode; and a protective layer between the membrane and at least one electrode of the anode and the cathode, the protective layer having a layer of ionomer material containing a catalyst, the layer having a porosity of between 0 and 10%, an ionomer content of between 50 and 80% vol., a catalyst content of between 10 and 50% vol., and an electrical connectivity between catalyst particles of between 35 and 75%. A configuration using a precipitation layer to prevent migration of catalyst ions is also provided.
摘要:
A membrane electrode assembly includes an anode; a cathode; a membrane between the anode and the cathode and having a thickness defined between the anode and the cathode; and a catalyst diffusion barrier layer in a location bounded on one side by an interface between the membrane and the cathode, and bounded on the other side by a plane approximately 50% of the thickness of the membrane from the cathode. A method of manufacture is also provided.
摘要:
A flow battery includes an electrode operable to be wet by a solution having a reversible redox couple reactant. In one embodiment, the electrode can have plurality of micro and macro pores, wherein the macro pores have a size at least one order of magnitude greater than a size of the micro pores. In another embodiment, the electrode includes a plurality of layers, wherein one of the plurality of layers has a plurality of macro pores, and wherein another one of the plurality of layers has a plurality of micro pores. In another embodiment, the electrode has a thickness less than approximately 2 mm. In still another embodiment, the electrode has a porous carbon layer, wherein the layer is formed of a plurality of particles bound together.
摘要:
A fuel cell includes a cell having a solid oxide electrolyte between electrodes. The cell has a first coefficient of thermal expansion. A metallic support is in electrical connection with one of the electrodes. The metallic support includes a metal substrate and a compliant porous nickel layer that is bonded to the metal substrate between the cell and the metal substrate. The metal substrate has a second coefficient of thermal expansion that nominally matches the first coefficient of thermal expansion of the cell. The metal substrate has a first stiffness and the compliant porous nickel layer has a second stiffness that is less than the first stiffness such that the compliant porous nickel layer can thermally expand and contract with the metal substrate.
摘要:
An emission treatment system includes a separation device having a vessel that includes an inlet for receiving an emission stream having entrained solid particles. A first outlet from the vessel discharges captured solid particles from the emission stream and a second outlet from the vessel discharges a clean stream having fewer entrained solid particles than the emission stream received into the separation device. A particle collector is fluidly connected with the separation device and includes a collection portion for capturing solid particles from the emission stream.
摘要:
A device separates particulates from a gas stream flowing through the device. The device includes at least one high voltage electrode and a substantially cylindrical separator. The high voltage electrode applies a first voltage to the gas stream. The separator has an inlet for introducing the gas stream into the separator tangentially to an interior wall of the separator, a particulate outlet for expelling the particulates from the separator, and a gas stream outlet.