Samsung Sdi Co., Inc.

Alexey Alexandrovichserov

Chan Kwak

Si-Hyun Lee

Myoung-Ki Min

Geun-Seok Chai

Soon-Ki Kang

Ho-Jin Kweon

Jun-Won Suh

Ju-Yong Kim

Jin-Kwang Kim

Chan-Ho Lee

Sung-Chul Lee

Man-Seok Han

Jin-Goo Ahn

Yong-Kul Lee

Leonid Gorobinskiy

Won-Hyouk Jang

Kie Hyun Nam

Go-Ul Choi

Chan-Hee Park

Kie-Hyun Nam

Noboru Sato

Noboru Sata

A fuel cell catalyst includes a platinum-iron (Pt&#x2014;Fe) alloy having an ordered or disordered face-centered cubic structure or face-centered tetragonal structure. The face-centered cubic structure has a lattice constant ranging from about 3.820 &#x212b; to about 3.899 &#x212b; (or from about 3.862 &#x212b; to about 3.880 &#x212b;), and the face-centered tetragonal structure has a first lattice constant ranging from about 3.800 &#x212b; to about 3.880 &#x212b; (or from about 3.810 &#x212b; to about 3.870 &#x212b;) and a second lattice constant ranging from about 3.700 &#x212b; to about 3.810 &#x212b; (or from about 3.710 &#x212b; to about 3.800 &#x212b;). A membrane-electrode assembly can improve cell performance by including the above catalyst having the relatively high activity and selectivity for an oxidant reduction in at least one of an anode or a cathode, and can increase lifespan by inhibiting catalyst poisoning.

Fuel cell catalyst, method of preparing same, and membrane-electrode assembly for fuel cell and fuel cell system including same

The cathode catalyst for a fuel cell includes an RuSe alloy having an average particle size of less than or equal to 6 nm. The cathode catalyst may also include a metal carbide. The RuSe alloy is a highly active amorphous catalyst.

Cathode catalyst for fuel cell, method of preparing same, and membrane-electrode assembly comprising same

A cathode catalyst for a fuel cell includes a carrier, and an active material including M selected from the group consisting of Ru, Pt, Rh, and combinations thereof, and Ch selected from the group consisting of S, Se, Te, and combinations thereof, with the proviso that the active material is not RuSe when the carrier is C.

Catalyst for cathode of fuel cell, and membrane-electrode assembly for fuel cell

A cathode catalyst includes a carrier including Mo, S, and I, and an active metal supported on the carrier and including a material selected from the group consisting of Ru, Pt, Rh, and combinations thereof. It is shown that such a catalyst for a cathode has improved activity over platinum catalysts.

Cathode catalyst for fuel cell and membrane-electrode assembly for fuel cell and fuel cell system including same

The cathode catalyst for a mixed reactant fuel cell includes a mixed catalyst that includes a first catalyst including a Ru&#x2014;Ch1 compound where Ch1 is a chalcogens selected from the group consisting of S, Se, Te, and combinations thereof, and a second catalyst including a Pt&#x2014;Ch2 compound where Ch2 is a chalcogens selected from the group consisting of S, Se, Te, and combinations thereof. The cathode catalyst can improve excellent power characteristics of a fuel cell due to excellent catalyst activity and selectivity.

Catalyst for a cathode of a mixed reactant fuel cell, membrane-electrode assembly for a mixed reactant fuel cell including the same, and mixed reactant fuel cell system including the same

The porous carbon structure according to one embodiment of the present invention includes mesopores, and at least two kinds of macropores having different average pore diameters. The porous carbon structure includes inter-connected pores and thereby increases specific surface area and improves electronic conductivity.

Porous carbon structure, method for preparing same, electrode catalyst for fuel cell, and electrode and membrane-electrode assembly including same

The cathode catalyst for a fuel cell of the present invention includes M-Co-Ch where M is at least one metal selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt, and combinations thereof, and Ch is at least one element selected from the group consisting of S, Se, Te, and combinations thereof. The cathode catalyst of the present invention has high activity and excellent selectivity for reduction of an oxidant, and is capable of improving performance of a membrane-electrode assembly for a fuel cell, a fuel cell system including the same, and a membrane-electrode assembly including the same.

Catalyst for a fuel cell, method of preparing the same, and membrane-electrode assembly and fuel cell system including the same

A membrane-electrode assembly for a mixed reactant fuel cell and a mixed reactant fuel cell system including the same. In one embodiment of the present invention, a membrane-electrode assembly for a mixed reactant fuel cell includes an anode catalyst layer, a cathode catalyst layer, a polymer electrolyte membrane disposed between the anode catalyst layer and the cathode catalyst layer, an electrode substrate disposed on at least one of the anode catalyst layer or the cathode catalyst layer, and an oxidant supply path penetrating the polymer electrolyte membrane, the anode catalyst layer, the cathode catalyst layer, and the electrode substrate and adapted to supply an oxidant.

Membrane-electrode assembly for mixed reactant fuel cell and mixed reactant fuel cell system including same

A stack for a mixed oxidant fuel cell and a mixed oxidant fuel cell system including the stack. The stack includes at least one membrane-electrode assembly that includes a polymer electrolyte membrane, an anode and a cathode disposed on opposite sides of the polymer electrolyte membrane, and an electrode substrate disposed on at least one of the anode or the cathode; and an oxidant supply path and a fuel supply path that penetrate the membrane-electrode assembly. The oxidant supply path has both ends open, and the fuel supply path has one end open and the other end closed. The stack of the present invention can improve fuel cell efficiency by smoothly supplying a fuel and an oxidant. Particularly, since the stack is configured to supply the fuel and the oxidant without using a pump, it can make a fuel cell small and light.

Stack for mixed reactant fuel cell and mixed reactant fuel cell system including the same

The present invention relates to a cathode catalyst for a fuel cell, a membrane-electrode assembly for a fuel cell including the cathode catalyst, and a fuel cell system. The cathode catalyst includes a core including RuO, and Se and Pt. The Se and Pt are disposed to enclose the core. The cathode catalyst for a fuel cell of the present invention can have excellent catalyst efficiency, even if less platinum is included therein.

Cathode catalyst for fuel cell comprising platinum and selenium, membrane-electrode assembly for a fuel cell having the same, and fuel cell system having the same

A reformer for a fuel cell system includes a heating source for generating heat by a reaction of a fuel and an oxidant using an oxidizing catalyst, and a reforming reaction part for generating hydrogen by a reforming catalyst reaction. The oxidizing catalyst includes a solid acid, including a strong acid ion and an inorganic oxide, and a platinum-based metal. The reformer for a fuel cell system can start a fuel oxidation catalyst reaction at a low temperature with the heating source having a simplified structure.

Reformer for fuel cell, and fuel cell system comprising the same

The cathode catalyst includes a zeolite-containing carrier, and a ruthenium (Ru)-M-tellurium (Te) alloy supported on the carrier, where M is selected from the group consisting of tungsten (W), molybdenum (Mo), and combinations thereof. The cathode catalyst has a high activity and selectivity for a reduction reaction of an oxidant, and is highly stable under an acidic atmosphere thereby being capable of improving performances of a membrane-electrode assembly and fuel cell system.

Catalyst for a fuel cell, a method for preparing the same, and a membrane-electrode assembly for a fuel cell and a fuel cell system including the same

A cathode catalyst for a fuel cell including a metal selected from the group consisting of In, Ga, and combinations thereof, and Ru&#x2014;Ch supported on the metal, where Ch includes a material selected from the group consisting of S, Se, Te, and combinations thereof. In one embodiment, the Ru&#x2014;Ch includes from about 70 to about 95 atom % of Ru, and from about 5 to about 30 atom % of Ch, and/or the Ru&#x2014;Ch is supported in an amount from about 5 to about 80 wt % based on the Ru&#x2014;Ch and the metal.

Supported ruthenium cathode catalyst for fuel cell

A cathode catalyst for a fuel cell includes a carrier and an A-B alloy supported on the carrier, where A is at least one metal selected from the group consisting of Pd, Ir, Rh, and combinations thereof, and B is at least one metal selected from the group consisting of Mo, W, and combinations thereof. The carrier is composed of at least one chalcogen element selected from the group consisting of S, Se, Te, and combinations thereof.

Catalyst for a fuel cell, a method for preparing the same, a membrane-electrode assembly for a fuel cell including the same, and a fuel cell system including the same

A cathode catalyst for a fuel cell, and a membrane-electrode assembly for a fuel cell and a fuel cell system that includes the same. The cathode catalyst includes an active material of an A-B-X compound where A is one of Cu, Ag or a combination thereof, B is one of Nb, Hf; Ta or combinations thereof, and X is one of S, Se, Te or combinations thereof, and a carbon-based material supporting the active material as a carrier.

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Suwon-si, South Korea

Alexey Alexandrovichserov