A membrane electrode assembly includes a membrane, an anode catalyst layer and a cathode catalyst layer. The anode catalyst layer is on a first side of the membrane and the cathode catalyst layer is on a second side of the membrane, wherein the second side of the membrane is opposite the first side of the membrane along a first axis. The cathode catalyst layer includes agglomerates formed of a catalyst support supporting catalyst particles, an agglomerate ionomer and an inter-agglomerate ionomer. The agglomerate ionomer surrounds the agglomerates and the inter-agglomerate ionomer is in regions between the agglomerates surrounded by the agglomerate ionomer. The agglomerate ionomer is different than the inter-agglomerate. Methods to produce the catalyst layer are also provided.

It becomes easy to regulate the storage modulus of the ionomer solution to be not lower than 150 Pa. The production method of catalyst ink for fuel cell includes steps of: (i) preparing a catalyst dispersion by mixing an electrode catalyst, water and an alcohol; (ii) preparing a gelated ionomer solution by mixing an ionomer and a solvent; and (iii) producing catalyst ink by mixing the catalyst dispersion and the gelated ionomer solution, wherein the step (ii) comprises concentration a step of concentrating the gelated ionomer solution.

Disclosed is a membrane electrode assembly that includes a polymer electrolyte membrane, a first electrochemical reaction layer formed on one side of the polymer electrolyte membrane to allow an oxidation reaction to occur thereon, a first electron-conductive layer formed between the polymer electrolyte membrane and the first electrochemical reaction layer, a second electrochemical reaction layer formed on a remaining side of the polymer electrolyte membrane to allow a reduction reaction to occur thereon, and a second electron-conductive layer formed between the polymer electrolyte membrane and the second electrochemical reaction layer.

Methods and compositions for making fuel cell components are described. In one embodiment, the method comprises providing a substrate, and forming or adhering an electrode on the substrate, wherein the forming includes depositing an aqueous mixture comprising water, a water-insoluble component, a catalyst, and an ionomer. The water-insoluble component comprises a water-insoluble alcohol, a water-insoluble carboxylic acid, or a combination thereof. The use of such water-insoluble components results in a stable liquid medium with reduced reticulation upon drying, reduced dissolution of the substrate, and reduced penetration of the pores of the substrate.

A mixed reactant fuel cell (MRFC) including a MRFC-optimized electrocatalyst utilizing a combination of selective catalysts and selective fuel distributors.

A device for manufacturing a membrane-electrode assembly of a fuel cell includes: an electrolyte membrane feeder unwinding an electrolyte membrane and supplying the unwound electrolyte membrane to a preset transfer path; a first catalyst coater installed in the side of the electrolyte membrane feeder and coating a first catalytic material on another surface of the electrolyte membrane every a preset pitch; a film processor installed in a rear side of the first catalyst coater, supplying a second protective film onto a first catalyst electrode layer on the other surface of the electrolyte membrane, and taking off the first protective film from the one surface of the electrolyte membrane; and a second catalyst coater installed in a rear side of the film processor and coating a second catalytic material on the one surface of the electrolyte membrane.

A powder for an air electrode in a solid oxide fuel cell, the powder consisting of: a metal composite oxide having a perovskite-type single phase crystal structure represented by A1.sub.1-xA2.sub.xBO.sub.3-δ, where the element A1 is at least one selected from the group consisting of La and Sm, the element A2 is at least one selected from the group consisting of Ca, Sr, and Ba, the element B is at least one selected from the group consisting of Mn, Fe, Co, and Ni, 0<x<1, and the δ is an oxygen deficiency amount. When a cross section of a molded body obtained by compression molding the powder is observed at a magnification of 500 times, and a characteristic X-ray intensity of the element B is measured by an energy dispersive X-ray spectroscopy, the number of regions each having an intensity of 50% or higher of a maximum of the characteristic X-ray intensity of the element B and occupying 0.04% by area or more of the observation field of view is five or less.

The present invention relates to a cathode material for a lithium-air battery and a method of manufacturing a cathode using the same. The cathode material of the present invention includes a solvent component and thus includes an electrolyte in a small amount compared to a conventional cathode material, thereby reducing the weight of a cathode manufactured using the cathode material, ultimately increasing the energy density of a lithium-air battery including the cathode.

A solid oxide electrochemical cell includes a solid oxide electrolyte, a fuel-side electrode located on a first side of the solid oxide electrolyte, and an air-side electrode located on a second side of the solid oxide electrolyte. The air-side electrode includes a strontium getter material, a current collector layer and a functional layer located between the current collector layer and the second side of the solid oxide electrolyte.

The present specification relates to a sheet laminate for a solid oxide fuel cell, a precursor for a solid oxide fuel cell including the same, an apparatus for manufacturing a sheet laminate for a solid oxide fuel cell, and a method for manufacturing a sheet laminate for a solid oxide fuel cell.