The present specification relates to a complex electrolyte membrane, an enhanced complex electrolyte membrane and a fuel cell including the same.

The present specification relates to a complex electrolyte membrane, an enhanced complex electrolyte membrane and a fuel cell including the same.

An anion exchange membrane includes a porous structural framework and bismuth atoms bonded to pore surfaces of the porous structural framework. Each bismuth atom is bonded to a pore surface by way of one or two oxygen atoms.

The invention relates to inorganic particles which are covalently bonded to first polymer chains made up of at least one polymer carrying proton exchange groups, optionally in the form of salts, and bonded to second polymer chains made up of at least one fluorinated polymer that does not carry any proton exchange groups, the second chains being bonded to the particles via organic spacer groups, or the second chains being bonded to first chains via organic spacer groups, or some of the second chains being bonded to the particles via organic spacer groups while the remaining second chains are bonded to first chains via organic spacer groups.

Disclosed is an electrolyte membrane for a membrane-electrode assembly, which may include a filler that is a polymer compound (oligomer) having a low molecular weight. The electrolyte membrane may suitably include an oligomeric poly(vinylpyrrolidone) compound including a sulfonic acid group. The electrolyte membrane for a membrane-electrode assembly may have improved proton conductivity.

Disclosed herein are composite films comprising a plurality of nanostructured metal oxide crystals dispersed within a proton conducting polymer phase, wherein the plurality of nanostructured metal oxide crystals have an average particle size of from 1 nm to 20 nm, and wherein the composite film comprises from 20% to 90% by volume of the plurality of nanostructured metal oxide crystals relative to the composite film. The composite film can have a proton conductivity of 10.sup.−8 S/cm or more at a temperature of 100° C. or more.

Disclosed herein are composite films comprising a plurality of nanostructured metal oxide crystals dispersed within a proton conducting polymer phase, wherein the plurality of nanostructured metal oxide crystals have an average particle size of from 1 nm to 20 nm, and wherein the composite film comprises from 20% to 90% by volume of the plurality of nanostructured metal oxide crystals relative to the composite film. The composite film can have a proton conductivity of 10.sup.−8 S/cm or more at a temperature of 100° C. or more.

Described herein is a polymer-electrolyte-membrane fuel cell (PEMFC) that incorporates a shunt into the membrane separator that becomes electronically conductive around a well-defined anodic onset potential, thereby preventing excessive anodic potentials at the positive electrode that would otherwise drive deleterious parasitic reactions such as catalyst dissolution or catalyst and carbon oxidation.

Described herein is a polymer-electrolyte-membrane fuel cell (PEMFC) that incorporates a shunt into the membrane separator that becomes electronically conductive around a well-defined anodic onset potential, thereby preventing excessive anodic potentials at the positive electrode that would otherwise drive deleterious parasitic reactions such as catalyst dissolution or catalyst and carbon oxidation.

The present disclosure relates to an electrolyte membrane for fuel cells including a hydrogen peroxide generating catalyst and a hydrogen peroxide decomposing catalyst, the electrolyte membrane exhibiting highly improved durability, and a method of manufacturing the same. Specifically, the electrolyte membrane includes a support and a catalyst particle including a catalyst metal supported by the support, the catalyst metal including one selected from the group consisting of a first metal having catalyst activity to generate hydrogen peroxide, a second metal having catalyst activity to decompose hydrogen peroxide, and a combination thereof.