摘要:
A process comprising: providing a substrate with a catalyst layer thereon; depositing a first ionomer overcoat layer over the catalyst layer, the first ionomer overcoat layer comprising an ionomer and a first solvent; drying the first ionomer overcoat layer to provide a first electrode ionomer overcoat layer; depositing a second ionomer overcoat layer over the first electrode ionomer overcoat layer, and wherein the second ionomer overcoat layer comprises an ionomer and a second solvent.
摘要:
A process comprising: providing a substrate with a catalyst layer thereon; depositing a first ionomer overcoat layer over the catalyst layer, the first ionomer overcoat layer comprising an ionomer and a first solvent; drying the first ionomer overcoat layer to provide a first electrode ionomer overcoat layer; depositing a second ionomer overcoat layer over the first electrode ionomer overcoat layer, and wherein the second ionomer overcoat layer comprises an ionomer and a second solvent.
摘要:
Provided is an electrolyte membrane containing: a reinforced inner layer; and an unreinforced outer layer on one or each side of the reinforced inner layer, wherein the reinforced inner layer includes an inner ion exchange resin reinforced with a non-woven fabric composed of a melt moldable fluororesin in the form of a continuous fiber, wherein a number of intersecting points of the continuous fiber are fused and/or bonded, and wherein the unreinforced outer layer includes an outer ion exchange resin, which may be the same as or different from the inner ion exchange resin. Also provided is a membrane electrode assembly for a polymer electrolyte fuel cell, wherein the membrane electrode assembly contains the above-mentioned polymer electrolyte membrane.
摘要:
Provided is an electrolyte membrane and a process of producing the same, wherein the electrolyte membrane predominantly comprises an unreinforced outer layer on one or each side of a reinforced inner layer, wherein the reinforced inner layer comprises an inner ion exchange resin reinforced with a non-woven fabric comprising a melt moldable fluororesin in the form of a continuous fiber, wherein some intersecting points of the continuous fiber are fused or bonded, and wherein the unreinforced outer layer comprises an outer ion exchange resin, which may be the same as or different from the inner ion exchange resin. The electrolyte membrane has high strength, excellent dimensional stability and low electric resistance and is therefore useful as a polymer electrolyte membrane for a membrane electrode assembly for a polymer electrolyte fuel cell having high output and excellent durability.
摘要:
To provide an electrolyte membrane having high strength even if it is thin in the thickness, excellent dimensional stability even upon absorption of water and a low electrical resistance; a process for producing the electrolyte membrane; and a membrane-electrode assembly for polymer electrolyte fuel cells having a high output and excellent durability, having the electrolyte membrane. An electrolyte membrane which is made mainly of an ion exchange resin and reinforced with a non-woven fabric made of continuous fiber of a fluororesin wherein at least some of intersecting points of the continuous fiber are fixed, and which has, as the outermost layer on one side or each side, a layer not reinforced, made of an ion exchange resin which may be the same as or different from the above ion exchange resin. The non-woven fabric is produced by a melt-blown method.
摘要:
In the production of a membrane/electrode assembly 10, a first catalyst layer 22 (a second catalyst layer 34) is formed by a process comprising steps (a) and (b). (a) A step of applying a coating fluid comprising a catalyst and an ion-exchange resin, on a substrate to form a coating fluid layer. (b) A step of disposing a reinforcing layer 24 (34) on the coating fluid layer formed in the step (a) and then, drying the coating fluid layer to form a first catalyst layer 22 (a second catalyst layer 34) The process provides a catalyst layer whereby defects such as cracks are scarcely formed in the catalyst layer, and the bond strength is high at the interface between the catalyst layer and a reinforcing layer and at the interface between the catalyst layer and a polymer electrolyte membrane.
摘要:
To provide a membrane/electrode assembly for polymer electrolyte fuel cells, a polymer electrolyte fuel cell and processes for their production, which make it possible to stably exhibit a high power generation performance in various environments. A membrane/electrode assembly for polymer electrolyte fuel cells, which comprises a first electrode having a first catalyst layer and a first gas diffusion layer, a second electrode having a second catalyst layer and a second gas diffusion layer, and a polymer electrolyte membrane disposed between the first electrode and the second electrode, wherein the 90° peel strength at least one of the interface between the first electrode and the polymer electrolyte membrane and the interface between the second electrode and the polymer electrolyte membrane is at least 0.03 N/cm.
摘要:
To provide a process for forming a catalyst layer whereby defects such as cracks are scarcely formed in the catalyst layer, and the bond strength is high at the interface between the catalyst layer and a reinforcing layer and at the interface between the catalyst layer and a polymer electrolyte membrane; and a process for producing a membrane/electrode assembly for a polymer electrolyte fuel cell, which is capable of exhibiting high power generation performance even under a low humidity condition and has sufficient mechanical strength and dimensional stability and which has excellent durability even in an environment where humidification and drying, etc. are repeated.In the production of a membrane/electrode assembly 10, a first catalyst layer 22 (a second catalyst layer 34) is formed by a process comprising steps (a) and (b). (a) A step of applying a coating fluid comprising a catalyst and an ion-exchange resin, on a substrate to form a coating fluid layer. (b) A step of disposing a reinforcing layer 24 (34) on the coating fluid layer formed in the step (a) and then, drying the coating fluid layer to form a first catalyst layer 22 (a second catalyst layer 34).
摘要:
To provide a membrane/electrode assembly for polymer electrolyte fuel cells, a polymer electrolyte fuel cell and processes for their production, which make it possible to stably exhibit a high power generation performance in various environments. A membrane/electrode assembly for polymer electrolyte fuel cells, which comprises a first electrode having a first catalyst layer and a first gas diffusion layer, a second electrode having a second catalyst layer and a second gas diffusion layer, and a polymer electrolyte membrane disposed between the first electrode and the second electrode, wherein the 90° peel strength at least one of the interface between the first electrode and the polymer electrolyte membrane and the interface between the second electrode and the polymer electrolyte membrane is at least 0.03 N/cm.
摘要:
A process is provided whereby a membrane/electrode assembly for polymer electrolyte fuel cells whereby a high output voltage is obtainable within a wide range of current densities.A process for producing a membrane/electrode assembly 1 comprising a first electrode 10 having a first catalyst layer 12 and a first gas diffusion layer 14, a second electrode 20 having a second catalyst layer 22 and a second gas diffusion layer 24, and an electrolyte membrane 30, wherein the first gas diffusion layer 14, a first intermediate having the first catalyst layer 12 formed on the surface of the electrolyte membrane 30 by coating followed by annealing, and a second intermediate having the second catalyst layer 22 formed on the surface of the second gas diffusion layer 24 by coating, are bonded, so that the first catalyst layer 12 is located between the first gas diffusion layer 14 and the electrolyte membrane 30, and the second catalyst layer 22 is located between the second gas diffusion layer 24 and the electrolyte membrane 30.