To provide a high-voltage fuel cell. The fuel cell is a fuel cell comprising an anode-side gas diffusion layer, an anode catalyst layer, an electrolyte membrane, a cathode catalyst layer and a cathode-side gas diffusion layer in this order, wherein a gas diffusion resistance ratio of the anode-side gas diffusion layer to the cathode-side gas diffusion layer is more than 1.50 and less than 2.79; wherein a gas diffusion resistance value of the cathode-side gas diffusion layer is 84 S/m or less at a relative humidity of 165%; and wherein a gas diffusion resistance value of the anode-side gas diffusion layer is less than 234 S/m at a relative humidity of 165%.

The present disclosure provides an electrode assembly for a fuel cell without a proton exchange membrane, a preparation method thereof, and a fuel cell, and belongs to the technical field of fuel cells. The electrode assembly includes a polymer electrolyte layer, a negative pole catalyst layer and a positive pole catalyst layer located on two surfaces of the polymer electrolyte layer, and a negative pole diffusion layer located on the negative pole catalyst layer away from the polymer electrolyte layer, and a positive pole diffusion layer located on the positive pole catalyst layer away from the polymer electrolyte layer, wherein the polymer electrolyte layer is grown on the negative pole catalyst layer or/and the positive pole catalyst layer.

A fuel cell including a catalyst layer configured to generate liquid water in response to a reactant being in contact therewith. The fuel cell includes a microporous layer having a first region with a first pore size and a second region disposed adjacent to the first region having a second pore size. The first pore size being greater than the second pore size. The microporous layer being configured to transfer the liquid water away from the catalyst layer, such that the liquid water from the catalyst layer enters the first region in response to a capillary pressure of the liquid water being greater than a first capillary pressure. The liquid water enters the second region in response to a capillary pressure of the liquid water being greater than a second capillary pressure. The first capillary pressure being different from the second capillary pressure.

To provide a high-voltage fuel cell. The fuel cell is a fuel cell comprising an anode-side gas diffusion layer, an anode catalyst layer, an electrolyte membrane, a cathode catalyst layer and a cathode-side gas diffusion layer in this order, wherein a gas diffusion resistance ratio of the anode-side gas diffusion layer to the cathode-side gas diffusion layer is more than 1.50 and less than 2.79; wherein a gas diffusion resistance value of the cathode-side gas diffusion layer is 84 S/m or less at a relative humidity of 165%; and wherein a gas diffusion resistance value of the anode-side gas diffusion layer is less than 234 S/m at a relative humidity of 165%.

The present disclosure generally relates to a fuel cell electrode having a patterned microporous layer and method of fabricating the same.

This method for producing an electrode catalyst includes: a dispersion liquid preparation step wherein a dispersion liquid is prepared by mixing (i) at least one solvent selected from the group consisting of sulfoxide compounds and amide compounds, (ii) a catalyst carrier powder composed of a metal oxide, (iii) a platinum compound, (iv) a transition metal compound and (v) an aromatic compound that contains a carboxyl group; a loading step wherein the dispersion liquid is heated so that a platinum alloy of platinum and a transition metal is loaded on the surface of the catalyst carrier powder; a solid-liquid separation step wherein a dispersoid is separated from the dispersion liquid after the loading step, thereby obtaining a catalyst powder wherein the catalyst carrier powder is loaded with the platinum alloy; and a heat treatment step wherein the catalyst powder is heated under vacuum or in a reducing gas atmosphere.

A manufacturing process includes: depositing a catalyst support on a gas diffusion layer to form a catalyst support-coated gas diffusion layer; depositing a catalyst on the catalyst support-coated gas diffusion layer to form a catalyst-coated gas diffusion layer; and depositing an ionomer on the catalyst-coated gas diffusion layer to form an ionomer-coated gas diffusion layer. A membrane electrode assembly for a fuel cell includes: a gas diffusion layer; a polymer electrolyte membrane; and a catalyst layer disposed between the gas diffusion layer and the polymer electrolyte membrane, wherein the catalyst layer includes an ionomer, and a concentration of the ionomer varies within the catalyst layer according to a concentration profile.

Embodiments of the invention include fuel cells incorporating sheets and/or powders of silica fibers and methods for producing such devices. The silica fibers may be formed via electrospinning of a sol gel produced with a silicon alkoxide reagent, such as tetraethyl ortho silicate, alcohol solvent, and an acid catalyst.

[Problems] To easily and efficiently manufacture a catalyst layer having high catalytic activity and to easily manufacture a fuel cell having high power generation efficiency. [Solution] An apparatus for forming a catalyst layer 3 for a fuel cell on an electrolyte film (application object) 2, the apparatus including: a holding portion 6 that holds a sheet-shaped electrolyte film 2, an application portion 7 that applies a catalyst ink 5 for forming the catalyst layer 3 on at least one side of the electrolyte film 2 held by the holding portion 6, a chamber portion 8 that is capable of forming a space 55 including the holding portion 6, and a suction portion 9 that depressurizes the inside of the space 55 formed by the chamber portion 8 so as to dry the catalyst ink 5.

This invention provides an electrochemical system for manufacturing methanol from methane in good yields and without admixtures of methanol oxidation products. A fuel cell for methane or methanol utilization is also provided.