A fuel cell includes a reaction layer including: a membrane electrode assembly (MEA); and gas diffusion layers (GDLs) each of which is disposed at both side surfaces of the MEA. A porous separation layer has one surface adhered to one surface of the reaction layer and supplied with reaction gas, and a cathode bipolar plate has a panel shape and adhered to another surface of the porous separation layer. A front end part of the cathode bipolar plate having a manifold that is supplied with the reaction gas and having a plurality of diffusion channels through which the reaction gas directs from the manifold toward the porous separation layer. The cathode bipolar plate has a partition wall channel which separates the porous separation layer, which extends in a direction in which the reaction gas flows, and which extends from the manifold in a diagonal direction.

Methods for forming a metal oxide electrolyte improve ionic conductivity. Some of those methods involve applying a first metal compound to a substrate, converting that metal compound to a metal oxide, applying a different metal compound to the metal oxide, and converting the different metal compound to form a second metal oxide. Electrolytes so formed can be used in solid oxide fuel cells, electrolyzers, and sensors, among other applications.

Methods for forming a metal oxide electrolyte improve ionic conductivity. Some of those methods involve applying a first metal compound to a substrate, converting that metal compound to a metal oxide, applying a different metal compound to the metal oxide, and converting the different metal compound to form a second metal oxide. Electrolytes so formed can be used in solid oxide fuel cells, electrolyzers, and sensors, among other applications.

Provided is a membrane electrode assembly capable of keeping contact resistance between a catalyst layer and a gas diffusion layer (GDL) low. The membrane electrode assembly includes an electrolyte membrane and a pair of electrode layers disposed to sandwich the electrolyte membrane. The pair of electrode layers includes a pair of catalyst layers disposed to sandwich the electrolyte membrane, and a pair of GDLs disposed on opposite sides of the electrolyte membrane on the respective pair of catalyst layers. Each of the pair of GDLs includes a plurality of GDL protrusions that protrude on a catalyst layer side from the GDL and enter in the catalyst layer, and a gas flow path formed on an opposite side of the catalyst layer. Each of the pair of catalyst layers has a plurality of catalyst layer recesses in contact with the respective plurality of GDL protrusions.

The fuel cell single cell of the present invention includes: a membrane electrode assembly; a low-rigidity frame that supports the membrane electrode assembly; a pair of separators that holds the low-rigidity frame and the membrane electrode assembly therebetween; a gas channel for supplying gas to the membrane electrode assembly between the pair of separators; manifold parts that are formed in the low-rigidity frame and the pair of separators to supply the gas to the gas channel; restraining ribs that restrain the low-rigidity frame near the manifold parts; a projected part of the low-rigidity frame that projects toward the manifold parts beyond the restraining ribs; and a gas flow part that is formed in the projected part to supply the gas from the manifold part to the gas channel.

The fuel cell single cell of the present invention includes: a membrane electrode assembly; a low-rigidity frame that supports the membrane electrode assembly; a pair of separators that holds the low-rigidity frame and the membrane electrode assembly therebetween; a gas channel for supplying gas to the membrane electrode assembly between the pair of separators; manifold parts that are formed in the low-rigidity frame and the pair of separators to supply the gas to the gas channel; restraining ribs that restrain the low-rigidity frame near the manifold parts; a projected part of the low-rigidity frame that projects toward the manifold parts beyond the restraining ribs; and a gas flow part that is formed in the projected part to supply the gas from the manifold part to the gas channel.

This invention relates a non-sintered green sheet or tape comprising a corrugated surface having alternating crests and troughs arranged along both a first direction of the surface and a second direction of the surface, the second direction forming an angle of between 60? to 120? to the first direction, wherein the corrugation periods and/or corrugation amplitudes in the first direction differ from those in the second direction. The invention enables preparation of a reliable, large-sized ceramic sheet material, e.g. as a ceramic electrolyte layer for use in solid oxide cells, as a ceramic sheet for filter or membrane applications, or as sintering substrate or setter. In addition, sintered ceramic sheets and electrolytes, methods of preparation, and solid oxide cells (SOCs) making use of the non-sintered green sheet or tape are described.

This invention relates a non-sintered green sheet or tape comprising a corrugated surface having alternating crests and troughs arranged along both a first direction of the surface and a second direction of the surface, the second direction forming an angle of between 60? to 120? to the first direction, wherein the corrugation periods and/or corrugation amplitudes in the first direction differ from those in the second direction. The invention enables preparation of a reliable, large-sized ceramic sheet material, e.g. as a ceramic electrolyte layer for use in solid oxide cells, as a ceramic sheet for filter or membrane applications, or as sintering substrate or setter. In addition, sintered ceramic sheets and electrolytes, methods of preparation, and solid oxide cells (SOCs) making use of the non-sintered green sheet or tape are described.

The invention describes a membrane electrode assembly for use as a transport layer in polymer electrolyte fuel cells, the assembly comprising a porous metal gas diffusion layer (GDL) (20) and a catalyst layer (40) with a microporous layer (MPL) (30) interposed between them, the MPL (30) being constructed to fill the pores of the GDL (20) and coat the surface thereof.

The invention describes a membrane electrode assembly for use as a transport layer in polymer electrolyte fuel cells, the assembly comprising a porous metal gas diffusion layer (GDL) (20) and a catalyst layer (40) with a microporous layer (MPL) (30) interposed between them, the MPL (30) being constructed to fill the pores of the GDL (20) and coat the surface thereof.