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AssigneeAsahi Glass Company, Limited
InventorsSeigo KOTERA, Katsuya FUJII, Ichiro TERADA, Hiroshi UYAMA, Chie MATSUBARA
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To provide an electrode for a polymer electrolyte membrane having high gas diffusion performance, a membrane/electrode assembly, and a process for producing a nonwoven structure for a catalyst layer, which can produce the membrane/electrode assembly inexpensively and easily. The catalyst layer 11 of the electrode comprises a nonwoven structure of an ion-exchangeable fluoropolymer fiber, wherein the fiber diameter of the fiber is from 0.1 to 30 μm, and the bulk density of the nonwoven structure is from 0.1 to 1.1 g/cc. The nonwoven structure is produced by forming fiber from a fiber spinning stock solution containing the ion-exchangeable fluoropolymer by an electrical field fiber spinning method, followed by gathering the fiber. A catalyst is blended in the fiber spinning stock solution or is adhered on the nonwoven structure.
An electrode for a polymer electrolyte fuel cell having a catalyst layer, wherein the catalyst layer has a nonwoven structure of fiber containing an ion-exchangeable fluoropolymer and a catalyst, the fiber has a fiber diameter of from 0.1 to 30 μm, and the catalyst layer has a bulk density of from 0.1 to 1.1 g/cc.
An electrode for a polymer electrolyte fuel cell, having a catalyst layer, wherein the catalyst layer has a nonwoven structure of fiber containing an ion-exchangeable fluoropolymer, and a catalyst adhered on the fiber, the fiber has a fiber diameter of from 0.1 to 30 μm, and the catalyst layer has a bulk density of from 0.1 to 1.1 g/cc.
An electrode for a polymer electrolyte fuel cell, having a catalyst layer, wherein the catalyst layer has a nonwoven structure comprising fiber containing an ion-exchangeable fluoropolymer and a catalyst and fiber containing an ion-exchangeable polymer and no catalyst, the fiber has a fiber diameter of from 0.1 to 30 μm, and is the catalyst layer has a bulk density of from 0.1 to 1.1 g/cc.
A process for producing a catalyst-containing nonwoven structure for a catalyst layer of an electrode for a polymer electrolyte fuel cell, which comprises producing a catalyst-containing nonwoven structure having a bulk density of from 0.1 to 1.1 g/cc and having fiber with a fiber diameter of from 0.1 to 30 μm gathered, from a fiber spinning stock solution containing an ion-exchangeable fluoropolymer and a catalyst, by an electrical field fiber spinning method.
A process for producing a catalyst-containing nonwoven structure for a catalyst layer of an electrode for a polymer electrolyte fuel cell, which comprises producing a catalyst-containing nonwoven structure having a bulk density of from 0.1 to 1.1 g/cc and having fiber with a fiber diameter of from 0.1 to 30 μm gathered, from a fiber spinning stock solution containing an ion-exchangeable fluoropolymer, by an electrical field fiber spinning method, and letting a catalyst be supported on the nonwoven structure.
A process for producing a catalyst-containing nonwoven structure for a catalyst layer of an electrode for a polymer electrolyte fuel cell, which comprises producing a catalyst-containing nonwoven structure having a bulk density of from 0.1 to 1.1 g/cc and having each fiber with a fiber diameter of from 0.1 to 30 μm gathered, by fiber-spinning from each of a fiber spinning stock solution containing an ion-exchangeable fluoropolymer and a catalyst and a fiber spinning stock solution containing an ion-exchangeable fluoropolymer and no catalyst, by an electrical field fiber spinning method.
Dependencies are inferred from the claim text.