A gas diffusion assembly for a fuel cell includes: a sheetlike gas diffusion layer disposed on a carrier substrate, a sealing arrangement being disposed on at least one main side of the carrier substrate, and a connecting portion of the sealing arrangement being assigned to a surrounding edge of the gas diffusion layer, the connecting portion forming a sealing bead. The connecting portion fastens the gas diffusion layer with material bonding on the carrier substrate.

An electrochemical apparatus includes a reaction layer including a membrane electrode assembly (MEA); and separators respectively stacked on two opposite surfaces of the reaction layer, wherein each separator includes first channels disposed on a first surface thereof and second channels disposed on a second surface thereof, in which the separators are disposed such that the first channels or the second channels thereof face each other with the reaction layer interposed therebetween, simplifying a structure and a manufacturing process.

An electrochemical apparatus includes a reaction layer including a membrane electrode assembly (MEA); and separators respectively stacked on two opposite surfaces of the reaction layer, wherein each separator includes first channels disposed on a first surface thereof and second channels disposed on a second surface thereof, in which the separators are disposed such that the first channels or the second channels thereof face each other with the reaction layer interposed therebetween, simplifying a structure and a manufacturing process.

A redox flow battery includes positive and negative electrodes respectfully located in half-cells separated by a porous silicon wafer separator formed by MEMS Technology. The first half cell and the second half cell each preferably include a plurality of dividers or barriers configured to create flow channels which introduce turbulence insuring the electrolytes are changing or mixing at surfaces of the electrodes and the membrane. Also disclosed is a solar energy generation and storage system which includes a photovoltaic cell and an electrochemical energy storage battery which share a common electrode. Also disclosed is a membrane-less redox flow electrical energy storage battery, having a cathode electrode; an anode electrode formed of a porous silicon substrate in which surfaces of the pores of the porous silicon substrate are coated at least in part with a metal silicide; and, an electrolyte.

A redox flow battery includes positive and negative electrodes respectfully located in half-cells separated by a porous silicon wafer separator formed by MEMS Technology. The first half cell and the second half cell each preferably include a plurality of dividers or barriers configured to create flow channels which introduce turbulence insuring the electrolytes are changing or mixing at surfaces of the electrodes and the membrane. Also disclosed is a solar energy generation and storage system which includes a photovoltaic cell and an electrochemical energy storage battery which share a common electrode. Also disclosed is a membrane-less redox flow electrical energy storage battery, having a cathode electrode; an anode electrode formed of a porous silicon substrate in which surfaces of the pores of the porous silicon substrate are coated at least in part with a metal silicide; and, an electrolyte.

A plate structure, such as a plate electrode, comprising two outer layers and an intermediate layer. Both outer layers are provided with a pattern of recesses, such as hexagonal or circular recesses. The recesses on one outer layer are offset with respect to the recesses in the other outer layer. The intermediate layer comprises through-holes, each through-hole connecting a recess at one outer layer with a partially overlapping recess at the opposite outer layer.

A fuel cell that includes one or more fuel cell bipolar plates having a bipolar plate body with an inlet region, an outlet region, a reaction region arranged between and fluidically connected to the inlet region and the outlet region, and one or more microchannel fluid flow networks extending from the inlet region to the outlet region. The microchannel fluid flow networks include a plurality of primary flow microchannels having one or more secondary flow microchannels branching therefrom to facilitate reaction uniformity and fluid flow resistance through the fuel cell.

A fuel cell that includes one or more fuel cell bipolar plates having a bipolar plate body with an inlet region, an outlet region, a reaction region arranged between and fluidically connected to the inlet region and the outlet region, and one or more microchannel fluid flow networks extending from the inlet region to the outlet region. The microchannel fluid flow networks include a plurality of primary flow microchannels having one or more secondary flow microchannels branching therefrom to facilitate reaction uniformity and fluid flow resistance through the fuel cell.

The present invention relates to a fuel cell and a fuel cell stack comprising the same, and according to one aspect of the present invention, there is provided a fuel cell comprising a membrane-electrode assembly having a first surface and a second surface opposite to the first surface, wherein an anode electrode and a cathode electrode are each disposed on the first surface; an end plate disposed apart at a predetermined interval on the second surface; a first gas diffusion layer disposed on the anode electrode; a second gas diffusion layer disposed on the cathode electrode; a first separating plate disposed on the first gas diffusion layer and having a plurality of flow channels; and a second separating plate disposed on the second gas diffusion layer and having a plurality of flow channels.

An electrochemical cell has a membrane located between two flow field plates. On a first side of the membrane, there is a porous support surrounded by a seal between the membrane and the flow field plate. There is a gap between the porous support and the seal at the surface of the membrane. On a second side of the membrane, there is a seal between the membrane and the flow field plate located inside of the gap in plan view. The electrochemical cell is useful, for example, in high pressure or differential pressure electrolysis in which the second side of the membrane will be consistently exposed to a higher pressure than the first side of the membrane.