The invention relates to a method of producing electrode materials for solid oxide cells which comprises applying an electric potential to a metal oxide which has a perovskite crystal structure. The resultant electrode catalyst exhibits excellent electrochemical performance. The invention extends to the electrode catalyst itself, and to electrodes and solid oxide cells comprising the electrode catalyst.

The present invention relates to a method for producing a membrane for a fuel cell or electrolytic cell, in which (i) a liquid coating composition, which contains a supported catalyst containing precious metal and also contains an ionomer, is applied to a polymer electrolyte membrane which contains an ionomer, the ionomer of the liquid coating composition and the ionomer of the polymer electrolyte membrane each being a copolymer which contains as monomer a fluoroethylene and a fluorovinyl ether containing a sulfonic acid group, (ii) the coated polymer electrolyte membrane is heated to a temperature in the range from 178? C. to 250? C.

The present disclosure relates to a method of manufacturing catalyst slurry for fuel cells capable of greatly improving efficiency in use of catalyst metal and a method of manufacturing an electrode for fuel cells using the catalyst slurry manufactured using the method. Specifically, the method of manufacturing catalyst slurry for fuel cells includes preparing a catalyst including a porous carrier and catalyst metal, introducing the catalyst, a solvent, and an ionomer into a chamber, and infiltrating the ionomer into pores of the carrier.

A method is provided for determining a spatial distribution (Wc.sub.x,y.sup.f) of a parameter of interest (Wc) representative of a catalytic activity of an active layer of at least one electrode among two electrodes of an electrochemical cell, including steps of providing the cell, within which the parameter of interest (Wc) has an initial spatial distribution (Wc.sub.x,y.sup.i) of one or more values of catalytic load; defining a spatial distribution (T.sub.x,y.sup.c) of a set-point temperature (T.sup.c) within the cell in operation; measuring a spatial distribution (D.sub.x,y.sup.r) of a first thermal quantity (D.sup.r) within the cell in operation; estimating a spatial distribution (Wc.sub.x,y.sup.e) of a second thermal quantity (Q.sup.e) within the cell in operation, depending on the spatial distribution (T.sub.x,y.sup.c) and on the measured spatial distribution (D.sub.x,y.sup.r); and determining the spatial distribution (Wc.sub.x,y.sup.f) of the parameter of interest (Wc) depending on the estimated spatial distribution (Q.sub.x,y.sup.e) of the second thermal quantity (Q.sup.e).

A fuel cell may include a fuel supply unit for supplying hydrogen to a fuel cell stack; an air supply unit for supplying air to the fuel cell stack; and the fuel cell stack that generates energy using hydrogen and air supplied from the fuel supply unit and the air supply unit, wherein the fuel cell stack has a mesh structure and comprises a conductive polymer electrode containing about 0.1 to 1 wt % of polyethylene oxide (PEO) having a molecular weight of about 1,000 to 6,000 kg/mol.

The present invention relates to a method for manufacturing a protonic ceramic fuel cell, more particularly to a method for manufacturing a protonic ceramic fuel cell, which includes an electrolyte layer with a dense structure and has very superior interfacial bonding between the electrolyte layer and a cathode layer.

Disclosed is a process for the manufacture of a catalyst-coated membrane-seal assembly, including: (i) providing a carrier material; (ii-i) forming a first layer, the first layer being formed by: (a) depositing a first catalyst component onto the carrier material such that the first catalyst component is deposited in discrete regions; (b) drying the first layer; (ii-ii) forming a second layer, the second layer being formed by: (a) depositing a first seal component, such that the first seal component provides a picture frame pattern having a continuous region and void regions, the continuous region including second seal component and the void regions being free from second seal component; (b) depositing a first ionomer component onto the first layer, such that the first ionomer component is deposited in discrete regions; and (c) drying the second layer.

An electrolyte layer-anode composite member for a fuel cell includes a solid electrolyte layer containing an ionically conductive metal oxide M1, a first anode layer containing an ionically conductive metal oxide M2 and nickel oxide, and a second anode layer interposed between the solid electrolyte layer and the first anode layer and containing an ionically conductive metal oxide M3 and nickel oxide. A volume content Cn1 of the nickel oxide in the first anode layer and a volume content Cn2 of the nickel oxide in the second anode layer satisfy the relation Cn1<Cn2.

The present disclosure relates to a positive electrode for a lithium-air battery and a method for preparing the same, and the positive electrode for a lithium-air battery according to the present disclosure has advantages in that it improves electrical conductivity and mechanical strength of an electrode, and increases loading amounts.

A method for producing a membrane electrode assembly for a fuel cell comprising a proton exchange polymer membrane, catalyst layers, and first and second gas diffusion layers, the method comprising the following steps: a) forming a catalytic layer coating on a first surface of the membrane, the opposite surface being supported by a spacer; b) forming a catalytic layer coating on a first surface of the first gas diffusion layer; c) bringing the first surface of the first gas diffusion layer into contact with the surface opposite to the said first surface of the membrane, after removing the spacer, and bringing the first surface of the membrane into contact with a surface of the second gas diffusion layer.